Size effects affecting the phase diagrams of metals and alloys

• Project/Area Number: 21360309
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical properties of metals
• Research Institution: Osaka University
• Principal Investigator: MORI Hirotaro 大阪大学, 超高圧電子顕微鏡センター, 特任教授 (10024366)
• Co-Investigator(Kenkyū-buntansha): ARAKAWA Kazuto 島根大学, 総合理工学部, 准教授 (30294367)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000); Fiscal Year 2011: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2009: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
• Keywords: 相変態 / 状態図 / 電子顕微鏡 / 微小系

Research Abstract

The size effects affecting the phase diagrams of metals and alloys, have been studied both experimentally and theoretically. It is made clear that the phase stability of a pure metal nanoparticle can be controlled by the solubility of a substrate-constituting element in the pure nanoparticle. It is also revealed that the eutectic temperature decreases in proportion with the inverse radius of an alloy nanoparticle and always the slope of the linear relationship becomes steep as compared to the slope in pure metals.

Research Products

• [Journal Article] Comparative study on size dependence of melting temperatures of pure metal and alloy nanoparticles (2011)
  • Author(s): C. L. Chen, J.-G. Lee, K. Arakawa, H. Mori
  • Journal Title: Applied Physics Letters Volume: 99
  • Peer Reviewed
• [Journal Article] Quantitative analysis on size dependence of eutectic temperature of alloy nanoparticles in the Ag-Pb system (2011)
  • Author(s): C. L. Chen, J.-G. Lee, K. Arakawa, and H. Mori
  • Journal Title: Applied Physics Letters Volume: 98
  • URL: http://dx.doi.org/10.1063/1.3558921
  • Peer Reviewed
• [Journal Article] Comparative Study on Size Dependence of Melting Temperatures of Pure Metal and Alloy Nanoparticles (2011)
  • Author(s): C.L.Chen, J.-G.Lee, K.Arakawa, H.Mori
  • Journal Title: Applied Physics Letters Volume: 99
  • Peer Reviewed
• [Journal Article] Quantitative analysis on size dependence of eutectic temperature of alloy nanoparticles in the Ag-Pb system (2011)
  • Author(s): C.L.Chen, J.-G.Lee, K.Arakawa, H.Mori
  • Journal Title: Applied physics letters Volume: 98
  • Peer Reviewed
• [Journal Article] Two-dimensional metallic tungsten nanowire network fabricated by electron-beam-induced deposition (2010)
  • Author(s): C. L. Chen, K. Arakawa, and H. Mori￥
  • Journal Title: Nanotechnology Volume: 21 Issue: 28 Pages: 285304-285304
  • DOI: 10.1088/0957-4484/21/28/285304
  • Peer Reviewed
• [Journal Article] Electron-irradiation-induced phase transformationin alumina (2010)
  • Author(s): C. L. Chen, K. Arakawa, and H. Mori
  • Journal Title: Scripta Materialia Volume: 63 Pages: 1013-1016
  • URL: http://dx.doi.org/10.1016/j.scriptamat.2010.07.028
  • Peer Reviewed
• [Journal Article] Effects of temperature and electron energyon the electron-irradiation-induced decompositionof sapphire (2010)
  • Author(s): C. L. Chen, H. Furusho, and H. Mori
  • Journal Title: PhilosophicalMagazine Letters Volume: 90 Issue: 10 Pages: 715-721
  • DOI: 10.1080/09500839.2010.501768
  • Peer Reviewed
• [Journal Article] Effect of Pt on the electron-irradiationinduceddecomposition of sapphire (2010)
  • Author(s): C. L. Chen, K. Arakawa, and H. Mori
  • Journal Title: Scripta Materialia Volume: 63 Pages: 355-358
  • URL: http://dx.doi.org/10.1016/j.scriptamat.2010.04.007
  • Peer Reviewed
• [Journal Article] In situ observations of crystalline-toliquidand crystalline-to-gas transitions ofsubstrate-supported Ag nanoparticles (2010)
  • Author(s): C. L. Chen, J.-G. Lee, K. Arakawa, and H. Mori
  • Journal Title: Applied Physics Letters Volume: 96
  • URL: http://dx.doi.org/10.1063/1.3456382
  • Peer Reviewed
• [Journal Article] In situ observations of crystalline-to-liquid and crystalline-to-gas transitions of substrate-supported Ag nanoparticles (2010)
  • Author(s): C.L.Chen, J.-G.Lee, K.Arakawa, H.Mori
  • Journal Title: Applied physics letters Volume: 96
  • Peer Reviewed
• [Journal Article] Effect of Pt on the electron-irradiation-induced decomposition of sapphire (2010)
  • Author(s): C.L.Chen, K.Arakawa, H.Mori
  • Journal Title: Scripta materialia Volume: 63 Pages: 355-358
  • Peer Reviewed
• [Journal Article] Effects of temperature and electron energy on the electron-irradiation-induced decomposition of sapphire (2010)
  • Author(s): C.L.Chen, H.Furusho, H.Mori
  • Journal Title: Philosophical magazine letters Volume: 90 Pages: 715-721
  • Peer Reviewed
• [Journal Article] Electron-irradiation-induced phase transformation in alumina (2010)
  • Author(s): C.L.Chen, K.Arakawa, H.Mori
  • Journal Title: Scripta materialia Volume: 63 Pages: 1013-1016
  • Peer Reviewed
• [Journal Article] Two-dimensional metallic tungsten nanowire network fabricated by electron-beam-induced deposition (2010)
  • Author(s): C.L.Chen, K.Arakawa, H.Mori
  • Journal Title: Nanotechnology Volume: 21
  • Peer Reviewed
• [Journal Article] In situ HREM study on sublimation-induced phase change in nanometer-sized gold and silver particles (2010)
  • Author(s): J.-G.Lee, C.L.Chen, C.-J.Choi, H.Mori
  • Journal Title: Proceedings of the twentieth international offshore and polar engineering conference Volume: (Invited) Pages: 530-533
• [Journal Article] In situ atomic-scale observation of melting point suppression in nanometer-sized gold particles (2009)
  • Author(s): J.-G. Lee, J. Lee, T. Tanaka, and H. Mori
  • Journal Title: Nanotechnology Volume: 20 Issue: 47 Pages: 475706-475706
  • DOI: 10.1088/0957-4484/20/47/475706
  • Peer Reviewed
• [Journal Article] In situ TEM observation of the growth and decom-position of monoclinic W_<18> O_<49> nanowires (2009)
  • Author(s): C. L. Chen, H. Mori
  • Journal Title: Nanotechnology Volume: 20 Issue: 28 Pages: 285604-285604
  • DOI: 10.1088/0957-4484/20/28/285604
  • Peer Reviewed
• [Journal Article] Silver nanowires with a monoclinic structure fabricated by a thermal evaporation method (2009)
  • Author(s): C. L. Chen, H. Furusho, H. Mori
  • Journal Title: Nanotechnology Volume: 20 Issue: 40 Pages: 405605-405605
  • DOI: 10.1088/0957-4484/20/40/405605
  • Peer Reviewed
• [Journal Article] In situ TEM observation of decomposition of high-purity sapphire (2009)
  • Author(s): C. L. Chen, H. Furusho, H. Mori
  • Journal Title: Philosophical Mag-azine Letters Volume: 89 Issue: 2 Pages: 113-119
  • DOI: 10.1080/09500830802649778
  • Peer Reviewed
• [Journal Article] In situ TEM observations of irradiation-induced phase change in tungsten (2009)
  • Author(s): C. L. Chen, T. Nagase, H. Mori
  • Journal Title: Journal of Materials Science Volume: 44 Issue: 8 Pages: 1965-1968
  • DOI: 10.1007/s10853-009-3302-5
  • Peer Reviewed
• [Journal Article] In situ atomic-scale observation of melting point suppression in nanometer-sized gold particles (2009)
  • Author(s): J.-G.Lee, J.Lee, T.Tanaka, H.Mori
  • Journal Title: Nanotechnology 20
  • Peer Reviewed
• [Journal Article] In situ TEM observation of the growth and decomposition of monoclinic W_18O_49 nanowires (2009)
  • Author(s): C.L.Chen, H.Mori
  • Journal Title: Nanotechnology 20
  • Peer Reviewed
• [Journal Article] Silver nanowires with a monoclinic structure fabricated by a thermal evaporation method (2009)
  • Author(s): C.L.Chen, H.Furusho, H.Mori
  • Journal Title: Nanotechnology 20
  • Peer Reviewed
• [Journal Article] In situ TEM observation of decomposition of high-purity sapphire (2009)
  • Author(s): C.L.Chen, H.Furusho, H.Mori
  • Journal Title: Philosophical magazine letters 89 Pages: 113-119
  • Peer Reviewed
• [Journal Article] In situ TEM observations of irradiation-induced phase change in tungsten (2009)
  • Author(s): C.L.Chen, T.Nagase, H.Mori
  • Journal Title: Journal of materials science 44 Pages: 1965-1968
  • Peer Reviewed
• [Presentation] In-Situ Transmission Electron Microscopy Studies on the Dynamic Behaviors of Materials (2011)
  • Author(s): H. Mori, K. Arakawa, J. G. Lee, C. L. Chen
  • Organizer: IEEE NMDC
  • Place of Presentation: Jeju, Korea
• [Presentation] Electron-Irradiation-Induced Phase Change in Nanometer-Sized Al2Au Particles (2011)
  • Author(s): J. G. Lee, H. Mori
  • Organizer: 5th Congress of the International Union of Microbeam Analysis Societies(IUMAS-V)
  • Place of Presentation: Seoul, Korea
• [Presentation] In-Situ Transmission Electron Microscopy Studies on the Dynamic Behaviors of Materials (2011)
  • Author(s): H.Mori, K.Arakawa, J.G.Lee, C.L.Chen
  • Organizer: IEEE NMDC 2011
  • Place of Presentation: Jeju, Korea(招待講演)
• [Presentation] Electron-Irradiation-Induced Phase Change in Nanometer-Sized Al2Au Particles (2011)
  • Author(s): J.G.Lee, H.Mori
  • Organizer: 5th Congress of the International Union of Microbeam Analysis Societies (IUMAS-V)
  • Place of Presentation: Seoul, Korea
• [Presentation] TEMによる物質極微プロセスの解析 (2010)
  • Author(s): 森博太郎
  • Organizer: (社)日本金属学会関西支部、日本鉄鋼協会関西支部平成22年度本多光太郎記念講演会,
  • Place of Presentation: 大阪,大阪科学技術センター
  • Year and Date: 2010-07-16
• [Presentation] TEMによる物質極微プロセスの解析 (2010)
  • Author(s): 森博太郎
  • Organizer: (社)日本金属学会関西支部、日本鉄鋼協会関西支部平成22年度本多光太郎記念講演会
  • Place of Presentation: 大阪市大阪科学技術センター
  • Year and Date: 2010-07-16
• [Presentation] In situ TEM observation of decomposition of sapphire (2009)
  • Author(s): 陳春林、古庄公寿、永瀬丈嗣、森博太郎
  • Organizer: 日本顕微鏡学会第65回学術講演会
  • Place of Presentation: 仙台
  • Year and Date: 2009-05-27