Properties of alumina particles dispersed aluminum alloy composites fabricated by powder liquid forming technique.

DOI Web Site 5 Citations
  • WATANABE Hideo
    Technical Development Center, Mitsubishi Aluminum Co., Ltd. MA Disc Inc.
  • SAITOH Takashi
    Technical Development Center, Mitsubishi Aluminum Co., Ltd.

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  • 粉末液相成形法で作製したアルミナ粒子分散型アルミニウム合金複合材料の諸特性
  • フンマツ エキソウ セイケイホウ デ サクセイシタ アルミナ リュウシ ブンサ

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Abstract

Aluminum alloy matrix composites containing Al2O3 particles were fabricated by powder liquid forming technique. Tensile properties of composites depended on the size of alumina particles, and tensile strength showed 550MPa for 30 wt%Al2O3 (d=0.5μm)/6061 aluminum alloy composites. Aging sequence of composites was accelerated by the presence of alumina particles compaired with the matrix alloy. Spinel compounds (MgAl2O4) were detected in the Al2 O3/6061 aluminum alloy composites heated at high temperature for a long period. Thermal expansion coefficients of 6061 and AC8A alloy composites containing 30wt%Al2O3 particles respectively were reduced about 20% compaired with the matrix alloys.

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