Shibayama Tamaki

Faculty of Engineering　Center for Advanced Research of Energy and Materials　Labratory of Quantum Energy Conversion MaterialsProfessor
Last Updated :2026/03/10

■Researcher basic information

Researchmap personal page

Home Page URL

Researcher number

  • 10241564

J-Global ID

Research Keyword

  • Semiconductor nano particles
  • Ion irradiation effects
  • Nano particles
  • Operand Microscopy
  • Quantum beam analysis
  • Liquid TEM
  • Ionic liquids
  • Cathode Luminescence
  • Raman Scattering
  • Surface Plasmon
  • ナノ構造材料
  • 微細構造解析
  • 先進電子顕微鏡法
  • 低放射化原子力材料
  • 微細構造と機械特性相関
  • SiC/SiC複合材料

Research Field

  • Nanotechnology/Materials, Structural and functional materials
  • Nanotechnology/Materials, Inorganic materials
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Measurement engineering
  • Energy, Nuclear engineering
  • Nanotechnology/Materials, Metallic materials
  • Energy, Nuclear fusion
  • Nanotechnology/Materials, Composite materials and interfaces

Educational Organization

■Career

Career

  • Apr. 2015 - Present
    Hokkaido University, Faculty of Engineering, Professor
  • Apr. 2007 - Mar. 2015
    Hokkaido University, Fauclty of Engineering, Associate Professor
  • Apr. 2004 - Mar. 2007
    Hokkaido University, Center for Advanced Research of Energy and Materials, Associate Professor
  • Oct. 2002 - Mar. 2004
    Hokkaido University, Graduate School of Engineering, Division of Quantum Energy Engineering, 助教授
  • 2002 - 2004
    Associate Professor
  • Jan. 1998 - Sep. 2002
    Hokkaido University, エネルギー先端工学研究センター極限材料工学部門, 助手
  • 1998 - 2002
    Research Associate
  • Apr. 1992 - Dec. 1997
    Tohoku University, Irradiation Effects in Nuclear and Their Related Materials, Institute for Materials Research, 助手
  • 1992 - 1997
    Research Associate

Committee Memberships

  • Jun. 2019 - May 2021
    日本顕微鏡学会, 北海道支部長, Society
  • Apr. 2020 - Mar. 2021
    日本原子力学会, 材料部会長, Society
  • Jun. 2018 - May 2019
    日本原子力学会, 北海道支部長, Society
  • 2006 - 2009
    日本電子顕微鏡学会, 北海道支部役員, Society
  • 2006 - 2008
    日本金属学会, 分科会委員, Society

■Research activity information

Papers

Other Activities and Achievements

Affiliated academic society

  • プラズマ・核融合学会　　　　　　　　　　　　　　　
  • 日本原子力学会「照射損傷評価」研究専門委員会　　　　　　　　　　　　　　　
  • 日本原子力学会材料部会　　　　　　　　　　　　　　　
  • THE JAPANESE SOCIETY OF MICROSCOPY　　　　　　　　　　　　　　　
  • 日本金属学会　　　　　　　　　　　　　　　

Research Themes

  • Multielement Induced Opto-Critical Phases Tuned for All-Solar Utilization
    Grants-in-Aid for Scientific Research
    01 Apr. 2025 - 31 Mar. 2029
    渡辺 精一, 中川 祐貴, JEEM MELBERT, 柴山 環樹, 岡本 一将, 張 麗華
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 25H00787
  • Development of multi-type simultaneous measurement method in radiation field toward the creation of innovative materials
    Grants-in-Aid for Scientific Research
    05 Apr. 2021 - 31 Mar. 2025
    若井 栄一, 柴山 環樹, 岩元 洋介, 牧村 俊助, 佐藤 紘一, 豊田 晃大, 涌井 隆, 石田 卓, 鬼澤 高志
    本研究では、放射線下で生じる様々な物質での照射欠陥の基礎理論の構築のため、放射線場でも物質内部の欠陥状態を電気抵抗（ER）測定、陽電子寿命（PAL）測定、及び応力負荷・計測によって同時計測できるシステム構築を目指している。ER測定系では、電流源及び電圧源の購入、ER測定システムの構築、信号線の試料への接続手法の確立、極低温におけるER測定用冷凍機の購入とシステムの評価を実施した。また、応力を負荷できるパルスレーザーを試料に照射し、金属では欠陥に伴うERが増加し、半導体では電子移動度の上昇に伴うERが低下した。PAL測定系では、陽電子線源と試料が接触しない状態で測定を行えるシステムを構築するために必要なアバランシェフォトダイオード(APD)やデジタルオシロスコープ等を購入し、APDを透過する陽電子の信号を得るための作業を進め、まだシステムの構築段階にあるが、線源と試料が接触した状態では、レーザー照射下で材料に応力負荷の環境下で同時計測を実施できた。
    Fe系とW系のハイエントロピー(Fe-HEA、W-HEA）等の作製を試み、Fe-HEAは、磁性を持ち、純Wを超える硬さを持ち、その縦弾性率が鉄系材料と異なり、チタン系材料とほほ同じ値を持つことが分かった。W-HEAは、溶解法により、ほぼ均質な結晶化した合金を作製した。また、HEAをナノ粒子あるいは薄膜化し、触媒やフィルター等の新奇な機能材料として、Arガスのグロー放電による貴金属ターゲットのスパッタリングによってSi基板上のHEA薄膜作製とイオン液体を利用したHEAのナノ粒子作製法を試みた。
    メカニカルアロイング(MA)法で作製したW系材料の耐照射性評価やW中に混入するガス分子の機械特性に与える影響の調査を進めた。また、高速炉構造材料の評価では、超高圧電子顕微鏡の電子線照射法により、原子空孔の移動度と粒界析出物の安定性を評価した。
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Japan Atomic Energy Agency, 21H04668
  • ガルバニック水中結晶光合成の学理構築に基づく機能性３次元ヘテロナノ構造体創製
    科学研究費助成事業
    01 Apr. 2020 - 31 Mar. 2023
    渡辺 精一, JEEM MELBERT, 柴山 環樹, 岡本 一将, 張 麗華
    本研究は、水と光（可視光から紫外光）のみを用いる水中結晶光合成により、常温、大気圧、不純物無、さらに中性の水環境条件においても、金属原料からの酸化物ナノ構造体を一括作製可能にする手法の確立を目指し、将来の太陽光利用によるグリーンサステイナブルな材料生産を最終目的としている。原理的には水のみを用いるため、酸化物と水素しか生成しない、究極的、独創的な新グリーン材料創製手法である水中結晶光合成をさらに発展させ、ガルバニック効果を付与した水中結晶光合成（Galvanic-SPSC)の学理構築をまずは行う。さらに、それに基づく半導体ヘテロ接合機能の特徴を生かした多機能で高効率な光・電子変換機能性を有する３次元ヘテロナノ構造体創製を目指す。
    これまで、マスクパターンやメッシュ等を用い所定の箇所に各種金属酸化物のナノ構造を積み上げ、光・電子デバイスや光機能デバイス作製応用を行った。異種金属を使い、光ガルバニック効果（ガルバニック効果と光照射効果）により、各種金属のSPSC最適組み合わせを調査し、疑似太陽光照射を用いながら量子効率評価を行い、光・電子デバイス創製を行なった。
    具体的には、光電気化学測定を行い光照射効果による物性変化評価を行い光の波長、照射強度依存性を詳細に定量測定した。また、XPS,XRD,SEM,STEMによる材料組織解析ならびにPL,CLによる発光特性の光物性調査を行った。ヘテロナノ接合界面での特異な格子欠陥を同定するために、PLやCL測定に加えSTEM-EELS、吸光度測定、密度汎関数法に基づく第一原理計算から電子状態密度と誘電率評価を行い、光物性の発現機構を総合的に調査した。
    以上の結果を都合8編の論文成果物として公開することができた。今年度は5編、うち2022年一月にプレス発表一件を行うことができた。
    日本学術振興会, 基盤研究(A), 北海道大学, 20H00295
  • SiCセラミックスラスタに高い靱性を付与するハイパー・コンパージド技術
    科学研究費助成事業
    01 Apr. 2019 - 31 Mar. 2023
    岸本 弘立, 柴山 環樹, 芹澤 久, 中里 直史, 中田 大将
    本研究におけるスラスター製作において複数のSiC/SiCセグメントの統合を必要とする。本年度の実績の大きな項目は以下の3点である。1)形状付与したセグメントの一体化成型は無加圧で実施する必要があり、PIP法で製作した縦方向＋強化セグメントをNITE法で製作した内部セグメントに付与し、2）それらを一体化をRS法で実施する。3）熱伝導度と重量の観点から外部構造のためのC/SiCをNITE法で製作するための検討を行う。1)については2つのNITE SiC/SiC複合材料円管を使用してセグメントの一体化を模擬した技術検討を行った。円管を2つに分割し、2つをあわせた上で縦方向、および円周方向のSiC繊維を追加し、乾燥後に不融化処理を200℃,1h、焼成処理をAr雰囲気中で1200℃、1h実施することで強化セグメントを付与可能であることを示した。2)については1)の強化セグメントをるつぼ内に設置し、Siを1450℃で含侵させることで可能であった。3)はピッチ系およびPAN系の種々の炭素繊維のNITE法プロセス環境での安定性を評価したもので、NITEプロセス中にいずれの繊維も反応を生じ、断面積を減じる。一方で結晶構造により反応する厚さは異なり、全面非晶質の炭素繊維は中央部まで結晶相が成長して容易に破断しやすくなり、強化繊維としての機能を果たさなくなるのに対して、結晶性グラファイトの繊維は繊維表面近傍の結晶成長のみであり、曲げ試験および破面観察の結果からも繊維の強度特性の劣化は少ないものと推定される。一方で多くのマトリックスクラックが導入されるために、成型プロセス条件の最適化が必要であることも示されている。その他、SiC/SiCスラスターの燃焼試験装置は実験施設に設置し、冷却系の整備と水冷条件の調整を実施中である。
    日本学術振興会, 基盤研究(A), 室蘭工業大学, 19H00799
  • Challenge to elucidate and optimize the radiation sensitizing effect of gold nanoparticles by quantum life science approach
    Grants-in-Aid for Scientific Research
    01 Apr. 2018 - 31 Mar. 2022
    Hashimoto Takayuki
    Radiation effects on metals, such as gold nanoparticles, was investigated to improve the results of radiotherapy for intractable cancers. Observation of gold particles in cellular microstructure was delayed due to damage to an ultra-high voltage electron microscope caused by the great earthquake, and proton irradiation experiments using gold nanoparticles that can be administered into the body were not conducted during the period due to the intermittent issuance of a state of emergency declaration and priority measures to prevent spread of the COVID-19. In relation to the interaction between metals in the body and radiation, we published papers on proton therapy for pediatric cancer, in which the radiosensitizing effect of gold particles is expected to be clinically applicable, and on a comparative study of the effects of proton beams and carbon ion beams on implantable medical devices such as pacemakers, respectively.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K07660
  • 格子欠陥レベルで拡散経路を壅蔽する新奇酸化抑制機構の解明　　　　　　　　　　　　　　　
    挑戦的研究(萌芽)
    Jul. 2019 - Mar. 2022
    柴山 環樹
    日本学術振興会, Principal investigator, Competitive research funding
  • Investigation on Switching Mechanism of Resistive RAM using in-situ TEM-STM
    Grants-in-Aid for Scientific Research
    01 Apr. 2013 - 31 Mar. 2016
    Arita Masashi, TAKAHASHI Yasuo, SUEOKA Kazuhisa, SHIBAYAMA Tamaki, KUDO Masaki, OHNO Yuuki, TAKAHASHI Akihito, HIRATA Shuichiro, MURAKAMI Yosuke, OCHI Hayato, YONESAKA Ryota, MUTO Satoshi, NAKANE Akitoshi, HIROI Takahiro, KATSUMURA Reon, MORI Yuji
    Resistive memory (ReRAM) has been intensively investigated as a non-volatile memory satisfying beyond CMOS technology. Elucidation of its switching mechanism is the most important issue for practical use of ReRAM. While an operation mechanism based on electrochemistry has been proposed, details are obscure. In this work, the in-situ TEM was applied to solve this problem, where real-time observations of the microstructure were performed on metallic-filamant-type ReRAM. It was clarified that the metallic filament shows no remarkable change at the switching moment between high (HRS) to low (LRS) resistance states (Set and Reset). Switching occurs locally in nanometer scale. Remarkable change of the filament occurs with additional current flow. Large change of the filament induceas instability of the switching position and dissolution of metallic ions into the switching layer, and it generates device degradation. The power balance at Set and Reset is important for stable ReRAM operation.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 25420279
  • New challenge of grain boundary engineering for development of ferritic/martensitic heat-resistant steels with superior environmental durability
    Grants-in-Aid for Scientific Research
    01 Apr. 2012 - 31 Mar. 2016
    Tsurekawa Sadahiro, WATANABE Seiichi, SIBAYAMA Tamaki, MORIZONO Yasuhiro, YAMAMURO Takateru
    Grain boundary engineering (GBE) was applied to 9-12Cr heat-resistant ferritic steels with lath-martensite for achieving enhanced environmental durability. We could observably increase the fraction of coincidence site lattice (CSL) boundaries along the prior austenitic boundaries in martensite through a new processing route with a combination of thermomechanical treatment and martensitic transformation. In addition, the GBE could introduce a high density of subblock structure in martensite, which resulted in a homogeneous distribution of fine M23C6 precipitates in tempered martensite. These GBEed ferricitc steels showed superior resistances against high temperature creep, steam oxidation and liquid metal corrosion.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kumamoto University, 24246125
  • In-situ observation of dewetting phenomena by multi-quantum beam irradiation and investigation of their mechanism
    Grants-in-Aid for Scientific Research
    2014 - 2016
    SHIBAYAMA TAMAKI, YATSU Shigeo, LEI Yanhua
    In this study, to investigate the mechanism of quantum beam irradiation induced dewetting phenomenon by image analysis using Quantum Beam High Voltage Electron Microscope in Hokkaido University, in-situ observation under co-irradiation with 100keV Ar ions and nanosecond-pulsed laser with 532 nm, or each quantum beam irradiation were done.
    As a result of experiments, we succeeded to observe the behavior of Rayleigh instability during quantum beam irradiation induced dewetting of the noble metal changing from a rectangular shape to a spherical shape. As decreasing the thickness of the noble metal thin film, the average particle diameter of the nanoparticles is getting smaller than that of thicker one after dewetting. A blue shift of the absorption spectrum in the visible light region was confirmed due to the quantum effects.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 26420661
  • Visualization of interior originating small cracks in high strength titanium alloy and the clarification of very high cycle fatigue mechanisms
    Grants-in-Aid for Scientific Research
    01 Apr. 2012 - 31 Mar. 2015
    NAKAMURA Takashi, SHIBAYAMA Tamaki, SHIOZAWA Daiki, NAKAI Yoshikazu, UESUGI Kentarou
    Observations of internal fatigue cracks in Ti alloy were made by using synchrotron radiation micro CT imaging in the large synchrotron radiation facility (SPring-8) .Uniaxial fatigue tests were repeated on the specimen over 1.0E7 cycles, and the growth of the internal fatigue crack was measured by micro CT imaging. To investigate the effects of the environment around internal fatigue crack on crack growth process, the relationship between da/dN and stress intensity factor range were compared with that of surface cracks in vacuum environment. As a result, internal fatigue crack propagated quite slowly at a rate below 1.0E-10m/cycle. However, the fatigue crack advanced rapidly at a rate of around 1.0E-7m/cycle after reaching at the surface of specimen. Crack growth rate of internal crack agreed quite well with that of surface crack in vacuum. Therefore, vacuum-like environment around internal crack has an important role of fatigue crack process in the very high cycle regime.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 24246024
  • Development of in-situ TEM measurement system and its application to nanoelectronics
    Grants-in-Aid for Scientific Research
    2009 - 2011
    ARITA Masashi, TAKAHASHI Yasuo, SUEOKA Kazuhisa, SHIBAYAMA Tamaki
    In recent years, development of electronic devices is energetically investigated, where geometrical and magnetic mictro-and nano-structures contribute to the electronic properties. In this work, in-situ transmission electron microscopy (i. e. in-situ TEM) was introduced to these studies, where TEM image observations and electric measurements were simultaneously performed. To realize these experiments, special TEM holders were developed. One of them was a holder with a piezo actuator (i. e. TEM-STM holder), and the other was with an electromagnet system (named as a TEM-MF holder). Using the TEM-STM holder, formation and disappearance of a conductive filament inside the resistive RAM (ReRAM) layer was clearly observed. This result supports the filament model for ReRAM switching. On the other hand, the motion of the magnetic domain caused by the applied magnetic field generated by the TEM-MF holder was confirmed. Utility of in-situ TEM method was clearly demonstrated.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 21560681
  • Study of nano spatiotemporal dynamics on phase transformation in advanced materials by in situ observation technique
    Grants-in-Aid for Scientific Research(基盤研究(A))
    2009 - 2011
    Tamaki SHIBAYAMA, Seiichi WATANABE, Shigeo YATSU, Yoshihiro ITOH, Satoshi TOMIOKA, Syusuke NISHIYAMA, Sakaguchi NORIHITO
    In this study, we carried out the development of in-situ observation experimental apparatus on nano spatiotemporal dynamics to combine the streak camera which had many successful results of the measurements in pico second phenomena on the laser inertial confinement fusion reaction at the target region of the fuel pellets and the various high speed CCD cameras in order to find out a solution of the only remaining issues to improve the temporal resolution and extend the recording time in TEM for three years from FY2009 to FY2011. We installed the newly developed experimental apparatus to our present TEM and investigate the crack initiation point or the multi crack propagation at the interface of the joint under electron irradiation and ion irradiation by recording in nano spatiotemporal resolution where so far it has not been done by us, and revealed the interaction between the multi crack paths which grew in high speed and nano sized defects.
    Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 北海道大学, Principal investigator, Competitive research funding, 21241025
  • Comprehensive study on material damage mechanism by experimental and theoretical methods and development of materials for high-energy quantum-beam field
    Grants-in-Aid for Scientific Research
    2007 - 2010
    KAWAI Masayoshi, WATANABE Seiichi, KOKAWA Hiroyuki, KAWASAKI Akira, HASEGAWA Akira, KURISHITA Hiroaki, KIKUCHI Kenji, YOSHIIE Toshimasa, KAMIYAMA Takashi, HARA Nobuyoshi, YAMAMURA Tsutomu, FUTAKAWA Masatoshi, FUKAHORI Tokio, SAITO Shigeru, MAEKAWA Katsuhiro, ITO Takahiro, GOTO Takuya, SATO Koichi, HASHIMOTO Satoshi, TERASAWA Michitaka, WATANABE Yukinobu, XU Chao-Nan, ISHINO Shiori, SHIBAYAMA Tamaki, SAKAGUCHI Norihito, SHIMAKAWA Satoshi, NAO Takashi, IWASE Hiroshi, KANEKO Yoshihisa, KISHIDA Ippei, TAKENAKA Nobuyuki, NAKAI Kiyomichi
    The material in a high energy intense proton beam field receives damage due to an intense thermal shock and radiation. A shock damage process and influence were investigated experimentally and the easing method was drawn. Moreover, the simulation code which evaluates a radiation trauma theoretically was developed. Furthermore, our grain boundary engineering method has succeeded the four times increase in corrosion resistivity of various austenite stainless steels. New tungsten material developed with a ultra-fine grain powder has four times higher toughness than that of commercial tungsten and does ductility even at a room temperature. The quantitative method using the stress luminescence material in a shock experiment was devised to improve a material dynamics study.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), High Energy Accelerator Research Organization, 19106017
  • Study on single electron tunneling by means of TEM/STM to develop single electron devices operated at room temperature
    Grants-in-Aid for Scientific Research
    2006 - 2008
    有田 正志, 高橋 庸夫, 末岡 和久, 柴山 環樹
    省エネデバイスとして注目されている単電子デバイスの室温動作確認を念頭に,ピエゾ素子搭載型透過電子顕微鏡ホルダー(TEM/STMホルダー)およびその制御システムを開発した.先端10nm程度の先鋭電極間に数個のナノ粒子を挟み,その電気伝導特性を評価したところ低バイアス領域においてほとんど電流が流れないクーロンプロッケイド(CB(を観測できた。これは単電子トンネル現象(SET(に特徴的な現象である.数nmのナノ粒子を用いて室温動作SETデバイスの得られることを実験的に示すことができたといえる.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18560640
  • In-situ TEM observation of nano-dynamics to point defects in crystals by a ultra high-speed CCD camera
    Grants-in-Aid for Scientific Research(基盤研究(B))
    2004 - 2006
    Tamaki SHIBAYAMA, Hiroshi KINOSHITA, Norihito SAKAGUCHI, Takeharu ETOH
    In 2006, We investigated nano dynamics about irradiation defects and crack propagation of SiC/SiC composite material by a high-speed camera. Furthermore, we summarized results of in-situ TEM observation in the past three years. Accomplishment of our original purpose may be reached up to 70%, but it is thought that I clarified the purpose of this study enough. In addition, development of a pulse electron source of light to be based on a new idea by pulsed laser irradiation to a target in Germany, and to generate the electron which was high strength was done. The new electron microscope which they improved this electronic source and changed for electron gun of a normal electron microscope was developed in U.S.A., and it was reported in an international microscope congress held in Sapporo in September, 2006. Because a study was already made about some topics of materials science, and there were word of mouth and announcement with a poster, positioning of international of this study became clear. In this study, we used a general thermo electron source and a field emission electron source, however, for the American device, a pulsed electron source used. We aimed to record a series of events by a high speed CCD camera, but American team aimed to record an each phenomenon by a pulsed electron source as a strobe image to understand a series of high speed phenomena. However, it was advantage in our method to know the initiation of a certain phenomenon, and future development was expected in the above conference. We explored a new research field in this study and we will continue it in future and should be able to go ahead through a new project as mentioned above. In addition, because new issues were found through this study for the past three years, could reflect for the next project.
    Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding, 16360310
  • Studies of ultra structures in 3-D on developmental mechanisms of biological crystals.
    Grants-in-Aid for Scientific Research
    2003 - 2006
    WAKITA M., YAMAMOTO T., DOMON T., TAKAHASHI S., SHIBAYAMA T.
    The cryo-ultramicrotomy for cell membrane experiences could not have appropriate instrumentation for the aim of this research until the end of research period. So we made preparation of specimen by embedding specimen using only metyl-metacrylate method.
    As mentioned on research abstract proposed last year (2005), the monomer of metyl-metacrylate we use has highly volatile so we made much newly devised methods for polymerization of this resin. At first, we made to polymerize metyl-metacrylate in the small specimen bottle with tight cap. It could do polymerization with minimum volatilization.
    We made further to work it by two step embedding method, that is, half part of monomer was polymerized in the bottle before embedding specimen, then the specimen was set on the polymerized resin and pours rest of monomer for thoroughly polymerization. According to this embedding method, we could have the specimen floating in the larger resin block. After polymerization, the bottle was broken to have the resin block, and then the specimen was sawed out to make suitable size of specimen block. Because the block is too large, it is disadvantage we have to make longer work for getting the experimental block, and always to watch not missing the specimen direction. In this year, we tried to shape blocks with keeping the specimen direction from the lateral surfaces on the way to the final shape.
    We could not solve in the end of research period the problem of putting the ultra-thin sections on a slide glass for later treatment of de-embedding. We had the plan that sections put on the slide glass with the epoxy cement were rinsed by monomer to make tissue without resin. But we could find any appropriate method for it.
    Totally we could step on the primary research scheduled in the beginning, because we needed too much time for losing those problems. However, for those four years, each investigator of our team worked eagerly on this research, and at the same time each of us achieved good results personally as described on the report.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 15390548
  • 超高圧電子顕微鏡を用いた生体膜の三次元超微構造に関する研究
    科学研究費助成事業
    2003 - 2005
    脇田 稔, 山本 恒之, 土門 卓文, 高橋 茂, 柴山 環樹, 高橋 平七郎
    本年度は、昨年に続いて、クライオミクロトームの利用がほとんど不可能なことが明らかになったので、代替手段として、化学的固定による方法を資料作成のために応用することを引き続き試みた。標本を脱樹脂により観察するという本研究の特徴を実現するために、試料は全て、メタアクリレート樹脂あるいはブチルーメチルメタアクリレート樹脂に包埋した。アクリル樹脂モノマーは揮発性が高く、通常の方法では、重合作業中に蒸発するという致命的な欠陥があるので、今回は、半重合樹脂にモノマーの浸透が終了した試料を報マイすることをこころみた。試料は従来の透過電顕用試料より大きく、特に走査電顕用試料はかなり大きいので、通常の揮発性樹脂の包埋に使われる蓋付きポリエチレンカプセルでは不便なので、脱水や樹脂浸透に用いるガラス製試料ビンに包埋する方法によって包埋した。この方法は便か一度しか使えないと言う欠点があるが、アクリレート樹脂のような揮発性の強い包埋材の場合祐子菜穂右方と考えられる。ただし、この場合、試料は重合前のモノマーの中で沈むので、前年度と同様、重合樹脂ブロックの中程に試料が来るようにするために、試料ビンに1cmほどのモノマーを入れて重合した後、樹脂浸透の終了した試料を置き、静かに触媒入りモノマーを1cm〜1.5cmそそぎ入れ、蓋をして重合した。重合完了後、ガラスビンを割って重合試料ブロックを取り出す。ただし、半重合樹脂では、空気の混入が生じることが多く、重合中に樹脂そのものが発泡するという重大な欠点があり、あらかじめ、十分に脱気する必要があることがわかった。
    このブロックから試料を任意の方向から切り出すことが可能であるが、大きな切片の切り出しは極めて困難で、期間中に十分な成果を挙げることができなかった。
    共同研究者の教室では、超高圧電子顕微鏡による表面触媒の解析に関する業績が得られた。
    日本学術振興会, 萌芽研究, 北海道大学, 15659432
  • Development of a new specimen thinning technique based on the quantum process.
    Grants-in-Aid for Scientific Research
    2000 - 2003
    ICHINOSE Hideki, SHIBAYAMA Tamaki, IKUHARA Yuichi, TAKAHASHI Heisichiro
    The research is aimed to develop a new specimen thinning technique employing not an accelerated ions but a tuned short wave length electro magnetic wave to cut out atomic bonding on or near the materials surface to thin the specimen layer by layer without any damages on and in the specimen. The new technique is expected to increase the quality and the credibility of indispensable atomic structure information to the nano-technology obtained by a TEM. Apparent advancement in the precise control technique of the laser power, in development of fine focus control system and in high efficiency this technique on various materials were shown. Detailed results are as follows ; (1)A quantum-process thinning system equipped by both an ion gun and a laser gun was developed to acquire the optimum optical condition and energy density of the laser, (2)Both binary elemental covalent handing material (SiC) and a pure covalent bonding material (diamond) were thinned at the fixed wavelength to compare with Si to optimize the thinning condition. (3)A guiding rule to evaluate the size of evaporating material from the surface due to the laser irradiation was obtained. (4)A prototype of the new product was designed. The research is planned to be followed by the JST project on the next stage.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), 12355024
  • Development of tungsten alloys for high-heat-flux components application
    Grants-in-Aid for Scientific Research
    1997 - 1999
    KURISHITA Hiroaki, TOKIDA Tomohiro, YUBUTA Kunio, HIRAOKA Yutaka
    Tungsten is superior to other materials in physical and mechanical properties for use as high heat flux components infusion reactors. Key issue of the metal is to improve three embrittlement, I.e., low temperature embrittlement, recrystallization embrittlement and radiation embrittlement. In order to achieve simultaneous and significant improvements in those embrittlement, microstructures with very fine grains and dispersed particles of transition metal carbides (TMC) at grain boundaries may be most effective. Thus, to obtain such microstructures the mechanical alloying and hot isostatic pressing methods were applied to mixed powders of tungsten and TMC including TiC and HfC (group IV th) and TaC and NbC (group V th). Tungsten alloys thus prepared were subjected to impact 3-point bending tests to evaluate low temperature toughness, vacuum heating up to 2200 ℃ to evaluate recrystallization temperature and fast neutron irradiation experiments followed by PIE to evaluate radiation embrittlement. Microstructural observations were also made. It was found that among the prepared alloys, TiC added ones exhibited the most improved properties ; the alloys with 0.2wt% TiC addition showed much lower ductile-to-brittle transition temperature (by above 100 ℃) and much higher recrystallization temperature (by approximately 600 ℃) than commercially available pure tungsten and its alloys. It was also found that for achieving the improvement in radiation embrittlement which is the most crucial issue, the suppression of radiation hardening cannot be a solution, but active use of microstructural changes taking place during irradiation, such as radiation-induced or radiation-enhanced precipitation, to strengthen the weakest points in microstructures, providing the alloy composition that does not permit the precipitation of very brittle WィイD22ィエD2C.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), TOHOKU UNIVERSITY, 09558061
  • Development of Advanced Steels for Irradiation Environment
    Grants-in-Aid for Scientific Research
    1997 - 1998
    TAKAHASHI Heishichiro, KINOSHITA Hiroshi, SHIBAYAMA Tamaki, HU Benfu, WAN Farong
    1. When 316 stainless steel was electron-irradiated, stacking fault dislocation loops were nucleated, and then finally stacking fault tetrahedra of vacancy type (SFT) were nucleated inside the loops. These SFTs acted as void nucleation sites under electron/He dual irradiation.
    2. Fe-(15-16)% Cr-16% Mn-O.2% C-O.2% N steels have yield stress of 400 MPa and the elongation of 60% at room temperature. These high Mn steels showed excellent irradiation-resistance under irradiation.
    3. When Fe-Cr-Mn(W,V) steels with W and V were irradiated, no segregation was recognized, and then it was suggested that by adding W, and V segregation is retarded.
    4. The same Fe-Cr-Mn containing W and V showed higher resistance for irradiation at
    625K but at higher temperature a lot of small voids were nucleated.
    5. In Fe-Cr-Mn steels the segregation at grain boundary was larger than the steel with W and V.
    6.lt was clarified for Fe-(13-16) Cr-(6.5-24.5) Mn-(0.02-0.2)C-0.2 N steels that (a) by contorolling the composition of Cr, C,N single phase of austenite can be obtained even for lower Mn concentration steels, (b)Fe-(15-16)wt% Cr-15.5wt% Mn-(O.02-O.2)wt% C-0.2wt% N steels have excellent mechanical properties, and (c) voids formation were perfectly retarded for Fe-l6wt% Cr-15.5wt% Mn-O.2wt% C-O.2wt% N steel under irradiation at 473-673K.
    Japan Society for the Promotion of Science, Grant-in-Aid for international Scientific Research, HOKKAIDO UNIVERSITY, 09045042
  • レーザー照射による酸化物分散強化傾斜機能材料開発に関する研究
    科学研究費補助金(奨励研究(A))
    1994 - 1994
    柴山 環樹
    レーザー照射は、局所的に融点直下まで瞬時に加熱出来、照射を中止することにより急速冷却が可能である。その、特徴を用いて従来にない機能を発現する材料の開発が試みられている。一方、酸化物分散強化鋼は高温強化だけでなく耐照射特性に優れていることが明らかになってきた。しかしながら、強加工に起因する強度の異方性が構造材料に適用する場合、問題となっている。そこで、本研究ではレーザー照射を酸化物分散強化鋼にの表面改質に適用し強度の異方性を改善すること及び高温材料として期待されているTiALと接合し耐照射性及び高温強度にも優れた傾斜機能材料の開発に関する基礎的知見を得る事を目的とした。TiAlとの接合には、昨年度実施した奨励研究(A)において試みたTi、Al多層膜にレーザー照射を行うことによって合金化する事を適用し接合界面における組成の傾斜化を検討した。供試材として市販のMA957酸化物分散強化鋼を用いた。試料の形状は、棒鋼で30Ф×100である。レーザー照射には、3kW炭酸ガスレーザー加工機を本研究費で購入したコンピューターで制御し用いた。押し出し方向に対して平行と垂直に棒鋼をレーザー照射した。いずれの表面も、加工ガスがレーザー照射方向に吹き付けられるため急速溶解凝固した液的状の組織を呈していた。レーザ照射による熱影響を知らべるためそれぞれの切断方向に対し垂直に切断し金相観察を行った。表面から数μmの領域には、微細な空孔が観察出来た。しかし、それ以降の領域には観察出来ずほぼレーザー照射前と同様の組織を呈していた。そこで、400kV高分解能分析電子顕微鏡を用いて微細組織の同定を行ったところ、表面部分の組織は加工組織が消滅しほぼラス状のベイナイトを形成しており組織からは表面部分の組織の異方性は改質されたと考えられる。また、所々非晶質が観察されレーザー照射による非平衡相形成が認められた。
    文部科学省, 奨励研究(A), 東北大学, Principal investigator, Competitive research funding, 06750702
  • レーザー照射による金属間化合物の機械的特性向上に関する研究
    科学研究費補助金(奨励研究(A))
    1993 - 1993
    柴山 環樹
    レーザー照射は、従来の加熱装置に比べ急速加熱し急速冷却出来ることから従来にない機能を発現する新材料の開発手段として有効である。そこで、本研究は高温強度に優れ重量比強度が高い金属化合物の合金粉末作製にレーザー照射を適用すること、及び多層膜にレーザー照射を行い金属間化合物を作製することによって機械的特性を向上させ原子力材料としての適合性を明らかにすることを目的とした。科学研究費補助金で購入した市販のチタン板とアルミ板を積層させロータリーポンプで排気したチャンバー内に固定し、3KWの炭酸ガスレーザーを試料表面が焦点面になるようにして照射した。加工ガスには、窒素ガスを用いた。レーザー直下に設置した金型に吹き付けることによって得られた合金粉末の形状を調べるために走査電子顕微鏡で観察した結果、ほぼ球形で数mumの大きさであることがわかった。合金粉末の組成を調べるためにX線回折を行った結果、Ti_3Al及びTiAl,Al_3Tiが形成していることが判明した。その合金粉末を一軸冷間プレスを行って成形し、科学研究費補助金で購入した精密低速切断装置を用いて薄片化し電解研磨の後高分解能電子顕微鏡で微細組織観察を行った。制限視野電子回折像は、デバイシェーラー環と複数の斑点を示し組織が非常に微細で複数の相が混在していることを示唆された。タンデム型加速器を用いて3MeVのAu^<2+>イオンを540℃で約250dpaまで照射した結果、更に結晶粒は微細化しボイドは観察されなかった。今後、更に高温で照射実験を行い現在中性子照射中の試料と共に組織変化と機械的特性の変化について研究する計画である。以上、本研究においてチタンとアルミを積層させた多層膜にレーザーを照射することによってTi_3Al及びTiAl,Al_3Ti層を含む微細結晶粒の金属間化合物粉末を作製できることが明らかとなった。
    文部科学省, 奨励研究(A), 東北大学, Principal investigator, Competitive research funding, 05750590
  • ナノ構造材料の組織制御と革新的機能発現，超高速物質移動現象の可視化　　　　　　　　　　　　　　　
    Competitive research funding
  • utilization of innovative properties by control of nano structure in materials, visualization of ultra high speed phenomena in solid state　　　　　　　　　　　　　　　
    Competitive research funding

Industrial Property Rights

  • 導体微粒子を製造する方法
    Patent right, 渡辺 精一, 鳥谷部 祐, 谷津 茂男, 柴山 環樹, 水野 忠彦, 環境エンジニアリング株式会社
    特願2008-558014, 15 Feb. 2008
    特許第5254811号
    26 Apr. 2013
    201303009226200636
  • 半導体ナノ粒子及びその製造方法
    Patent right, 鳥本 司, 桑畑 進, 大谷 文章, 柴山 環樹, 工藤 昭彦, 櫻岡 美和, 足立 知弘, 国立大学法人名古屋大学
    特願2007-533281, 30 Aug. 2006
    特許第5162742号
    28 Dec. 2012
    201303013896086025
  • ナノ粒子の製造方法及びナノ粒子分散液
    Patent right, 鳥本 司, 岡崎 健一, 太田 康弘, 桑畑 進, 柴山 環樹, 国立大学法人名古屋大学, 国立大学法人大阪大学
    特願2010-266456, 30 Nov. 2010
    特開2012-117097, 21 Jun. 2012
    201203090473195020
  • 導体微粒子を製造する方法
    Patent right, 渡辺 精一, 鳥谷部 祐, 谷津 茂男, 柴山 環樹, 水野 忠彦, 国立大学法人北海道大学
    JP2008000240, 15 Feb. 2008
    WO2008-099618, 21 Aug. 2008
    201003045978817629
  • 半導体ナノ粒子及びその製造方法
    Patent right, 鳥本 司, 桑畑 進, 大谷 文章, 柴山 環樹, 工藤 昭彦, 櫻岡 美和, 足立 知弘, 国立大学法人名古屋大学, 国立大学法人大阪大学, 国立大学法人 北海道大学, 学校法人東京理科大学
    JP2006317072, 30 Aug. 2006
    WO2007-026746, 08 Mar. 2007
    200903056285605718

syllabus

  • 大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目
  • 量子ビーム材料物性特論, 2024年, 修士課程, 工学院
  • 量子ビーム材料物性特論, 2024年, 博士後期課程, 工学院
  • 機械知能工学入門, 2024年, 学士課程, 工学部
  • ラボラトリーセミナー, 2024年, 学士課程, 工学部
  • 物理化学, 2024年, 学士課程, 工学部
  • 材料科学, 2024年, 学士課程, 工学部
  • 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育