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1998 Fiscal Year Final Research Report Summary

Improvement of mechanical properties of short fiber reinforced

Research Project

Project/Area Number 09450251
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Composite materials/Physical properties
Research InstitutionOsaka University

Principal Investigator

SUGANUMA Katsuaki  ISIR,Osaka University Professor, 産業科学研究所, 教授 (10154444)

Co-Investigator(Kenkyū-buntansha) INOUE Masahiro  ISIR,Osaka University Research Associate, 産業科学研究所, 助手 (60291449)
Project Period (FY) 1997 – 1998
KeywordsMetal / Ceramic composites / Processing / Interface / Mechanical properties / Thermal properties
Research Abstract

For short fiber reinforced aluminum matrix composites, preforms are first made in the process of the squeeze casting. Silica has been widely used as the sintering binder for preforms. However, silica reacts with aluminum liquid severely and causes primarily two serious problems. One is trapping active elements such as magnesium resulting in softening a matrix. The other is formation of silicon large particles in a matrix resulting in making a composite very brittle. In the present work, a new binding method of fibers and particles has been developed without silica. Fine gamma phase alumina particles is proved to be very much effective to sinter alumina fiber preforms. The strength of the preform is more than ten times higher than those sintered with silica. This makes composites deformation free and cracking free during squeeze casting. There is no problem of the magnesium trapping and the silicon particle formation. This strong skeleton structure of the fiber preform provides excellent high temperature strength to the aluminum matrix composite.
Without silica binding, silicon carbide particles/aluminum composites can be fabricated successfully. The composites with silica exhibit quite low thermal expansion much lower than the composites with silica and also lower than the values expected from theory, which is also attributed to the formation of the skeleton structure of silicon carbide particles in a composite. This composite is expected to establish as the new type of heat-sinks for electronics applications.

  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] K.Tanihata and K.Suganuma: "Fabrication of Ceramics-Metal Composite by Pressure Infiltration of Metal to Porous Ceramics" Key Eng.Mater.161-163. 259-262 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅沼克昭,E.Zais and A.P.Tomsia: "純アルミニウム/α相アルミナ界面の組織と強度" 日本金属学会誌. 62. 92-97 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Inoue,K.Suganuma and K.Niihara: "Fracture properties of Fe-40at%Al alloys fabricated by reactive hot-pressing" Scripta Mater.39. 1477-1482 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Inoue,H.Nagao,K.Suganuma and K.Niihara: "Fracture properties of Fe-40at%Al matrix composites reinforced with" Mater.Sci.and Eng.A.(1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上雅博,菅沼克昭: "さらなる高性能をめざして-アルミナイド複合材料の複合化の指針と強化メカニズム-" Boundary. 14〔3〕. 39-45 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅沼克昭: "コストパフォーマンスに優れた鋳造による金属とセラミックスの複合材料" Materials Integration. 12〔1〕. 23-31 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Mechanical behavior of reactively hot-pressed aluminide matrix composites" Mat.Res.Soc.Symp.Proc.460. 755-759 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Microstructure and mechanical properties of reactive-hot-pressed nickel aluminide matrix composites" Proc.5th Japan International SAMPE Symp.469-474 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Tanihata and K.Suganuma: "Fabrication of ceramic-metal composite by pressure infiltration of metal to porous ceramics" Key Eng.Mater.161-163. 259-262 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Ueshima, T.Oku, M.Inoue, K.Tanihata, M.Takahashi and K.Suganuma: "Microstructure and fracture strengh of TiN/Al and Al alloys Interface" Key Eng.Mater.161-163. 667-670 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Suganuma, E.Zais and A.P.Tomsia: "Microstructure and joining strength of aluminum/alpha-alumina interface" J.Jpn.Inst.Metals. 62. 92-97 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, H.Watanabe, K.Niihara and Suganuma: "Synthetic processes of uniform nickel aluminides by reactive infiltration and post hot-pressing of infiltrated precursors" Mater.Lett.34. 55-59 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue.K.Takahashi, K.Suganuma and K.Niihara: "Effect of boron doping on fracture properties of Ni_3Al matrix composites with ceramic particles" Scripta Mater.39. 887-892 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Fracture properties of Fe-40 at % Al alloys fabricated by reactive hot-pressing" Scripta Mater.39. 1477-1482 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Fracture properties of Fe-40 at % Al matrix composites reinforced with ceramic particles and fibers" Mater.Sci.and Eng.A258. 1477-1482 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Toughering mechanism of Ni_3 Al alloys by B doping" J.Mater.Sci.Lett.17. 1967-1969 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Strengh and fracture behavior of aluminide matrix composites with ceramic fibers" Mat.Res.Symp.Proc.(in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Inoue, K.Suganuma and K.Niihara: "Environmental effect on mechanical properties of aluminide matrix composites" Light Weight Metals for Aerospace Applications V,TMS. (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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