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1999 Fiscal Year Final Research Report Summary

Refining of dispersion particles synsesized in molten aluminium by thermit reaction

Research Project

Project/Area Number 09650814
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionOsaka Prefecture University

Principal Investigator

TSUJIKAWA Masato  Osaka Prefectural University, College of Engineering, Associate Professor, 工学部, 助教授 (90172006)

Project Period (FY) 1997 – 1999
KeywordsMetal Matrix Composite / Wear resistant materials / Particle dispersion slurry for casting / in site formation / Alumina particles / Aluminum alloy / fine particles dispersion / Friction and wear
Research Abstract

The particles dispersion composite aluminum alloy is excellent in wear resistance. The light wear resistant material has been required for the panic braking equipment of the transit system. Such materials have the difficulty in workability, and for the shaping, the casting seems to be an optimum. However, nonmetal particle dispersion to the molten metal maximizes the difficulty in production of composite slurry. It is getting harder, as the particle size is smaller and as total surface area of particles increase, because of the poor wettability.
As simple and easy formation technique of the alumina particle dispersion aluminum alloy slurry, bulky silica particles was mixed into molten aluminium, then the thermit reaction was caused. Alumina phase was produced in molten aluminum silicon alloy. In spite of there being only 63vol% of alumina for material silica, the reacted particles maintained the size and shape of material silica. It became clear that the reacted large particle were polycrystal complex in which the alumina grain of about 200nm mixed with aluminium melt.
The grain growth of the alumina phase is activated by the existence of the very high surface energy, while this slurry is retained at the stirring temperature. During the process of grain growth of alumina, isolated particles of about 5 μm in diameter were generated. Such a fine particles dispersed into molten matrix..
By optimizing reaction temperature and agitation temperature, it was possible to get particle dispersion material in which alumina particles of averages particle size of 5 μm were made to disperse from the silica of 150 μm to about 15vol%. This material showed the excellent wear resistance which exceeded that of hypereutectic aluminium alloy used as abrasion resistant aluminum alloy.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 辻川正人 他3名: "テルミット型反応生成粒子分散アルミニウム合金とその耐焼付き性"鋳造工学. 70. 121-125 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻川正人 他3名: "反応溶浸による高体積率の粒子複合アルミニウム鋳物"鋳造工学. 70. 175-179 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tsujikawa, T.Hashimoto, M.Hino, M.Kawamoto: "Particles Dispersion Aluminum Alloy Produced by Thermit reaction and Its Antiseizure Property"Journal of Japan Foundry Engineering Society. 70. 121-125 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Tsujikawa, S.Ayukawa, M.Hino, M.Kawamoto: "Aluminum Castings with High Particle Volume Fraction by Reactive Infiltration."Journal of Japan Foundry Engineering Society. 70. 175-179 (1998)

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

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Published: 2001-10-23  

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