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Design, Fabrication and Characterization of Advanced Metal Matrix Composites with Bimodal Size Distributions of Ceramic Particulates

Research Project

Project/Area Number 13450285
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionTokyo Institute of Technology

Principal Investigator

WAKASHIMA Kenji  Tokyo Institute of Technology, Precision and Intelligence Laboratory, Professor, 大学院・精密工学研究科, 教授 (70016799)

Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2003: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2001: ¥6,700,000 (Direct Cost: ¥6,700,000)
KeywordsMetal Matrix Composites / Ceramic Particulates / Reactive Synthesis / Aluminum / Titanium Boride / Alumina / Stiffness / Creep / アルミナ / 反応焼結 / ヤング率 / 微視力学 / アルミニウム(Al) / 二ほう化チタン(TiB_2) / 粒子強化
Research Abstract

This research has been done in an attempt to develop a new type of aluminum-base metal matrix composites (MMCs) with particulate ceramic reinforcements as advanced high-temperature structural materials. Paying special attention to different roles of ceramic particles with much different sizes in conventional particulate-reinforced MMCs and dispersion-strengthened alloys, we have planed to examine, toward the design of novel 'hybrid' particulate MMCs, the effects of particle size on elevated-temperature stiffness and creep resistance in MMCs which contain either one or both of fine (<1μm) and coarse (【approximately equal】10μm) ceramic particles. To this end, the present work begins with reactive synthesis of TiB_2 /Al MMCs from Al-Ti-B mixed elemental powders because this reactive powder processing can produce submicron-size TiB_2 particulates in situ in aluminum matrices. Here, we are much involved in a problem as to the undesirable compound Al_3Ti that forms intermediately and often r … More emains in final products under the usual processing conditions with heating temperatures of up to 1000℃. Our detailed study has shown that two intermediate compounds AlB_2 and Al_3Ti, known previously, can decompose in the presence of molten aluminun, forming TiB_2 and Al, i.e. AlB_2 +Al_3Ti→ TiB_2+4Al. This reveals a proper range of reactant compositions, xAl-Ti-2B with x【greater than or equal】4 for making the desired TiB_2 /Al two-phase MMCs, the critical composition x=4 corresponding to a maximum of 27.9 vol.% TiB_2. Then, the work proceeds to the fabrication of three different 20 vol.% TiB_2/Al MMCs wherein the particulate reinforcement is either one of very fine (<1μm) in situ and coarse (【approximately equal】10μm) 'ex situ' formed TiB_2, or both of these at equal amounts (10 vol,%). All the three have been successfully fabricated under essentially the same processing condition, and thereby our final experimental work on the measurement of temperature dependence of dynamic tensile modulus and creep tests is satisfactorily accomplished. Results are analyzed in detail in light of our micromechanics-based description of high-temperature deformation of MMCs, wherein the importance of strongly size-dependent stress relaxation of reinforcing particles is emphasized. The 'hybrid' particulate design and reactive synthesis route to fabrication is promising as advanced technology of high-temperature MMCs. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] A.Madgwick: "Steady-state creep of a composite"Mechanics of Materialia. 33. 493-498 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimoyamada: "High-temperature stiffness and creep properties of Al-TiB_2 particulate MMCs produced by reactive sintering"Proc.3rd Japan-Korea Joint Symp.on Composite Materials. 11-12 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimoyamada: "In situ synthesis and high-temperature properties of particulate TiB_2/Al composites"Proc.14th Int.Conf.on Composite Materials (ICCM-14) & SME Technical Paper TP03PUB295. (CD-ROM). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Wakashima: "In situ synthesis and properties of aluminum composites with ultrafine TiB_2 and Al_2O_3 particulates"Materials Science Forum. (to be published). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.Madgwick: "Steady-state creep of a composite"Mechanics of Materialia. 33. 493.-498 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimoyamada: "High-temperature stiffness and creep properties of Al-TiB_2 particulate MMCs produced by reactive sintering"Proc. 3rd Japan-Korea Joint Symp. on Composite Materials. 11-12 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimoyamada: "In situ synthesis and high-temperature properties of particulate TiB_2/Al composites"Proc. 14th Int. Conf. on Composite Materials (ICCM-14) (SME Technical Paper TPO3PUB295 from the Society of Manufacturing Engineering, Dearborn, MI). Paper No.0906(CD-ROM). 12 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Wakashima: "In situ synthesis and properties of aluminum composites with ultrafine TiB_2 and Al_2O_3 particulates"Materials Science Forum. (to be bublished). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimoyamada: "In situ synthesis and high-temperature properties of particulate TiB_2/Al composites"Proc.of the 14-th Int.Conf.on Composite Materials (ICCM-14). (CD-ROM). 0906 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takayuki Shimoyamada: "High-Temperature Stiffness and Creep Properties of Al-TiB_2 Particulate MMCs Produced by Reactive Sintering"Proc. of the 3rd Japan-Korea Joint Symposium on Composite Materials. 11-12 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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