メカニカルアロイング法と粉末冶金法によるSiC<SUB>p</SUB>/AlおよびSiC<SUB>w</SUB>/SiC<SUB>p</SUB>/Al複合材料の作製とその材料特性

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タイトル別名
  • Properties of SiC<SUB>p</SUB>/Al and SiC<SUB>w</SUB>/SiC<SUB>p</SUB>/Al Composites Prepared by Mechanical Alloying and the Powder Metallurgy Process
  • メカニカルアロイング法と粉末冶金法によるSiCp/AlおよびSiCw/SiCp/Al複合材料の作製とその材料特性
  • メカニカル アロイングホウ ト フンマツ ヤキンホウ ニヨル SiCp Al

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説明

In order to prepare SiCw/SiCp/Al duplex composites, SiCp was dispersed in Al by mechanical alloying and subsequently reinforced with SiCw by powder metallurgy. Mechanical alloying was carried out for 10 h by using an Attritor ball mill with addition of methanol. Mechanically alloyed powder which was mixed with SiCw was used for hot press and hot extrusion. The microstructures and mechanical properties were examined on the extruded composites. Uniform distribution of SiCp and SiCw was obtained in both composites with 100% relative density. SiCp/Al composites show a drastic increase of tensile strength by dispersion strengthening, while their elastic modulus remained nearly the same. Tensile strength and elastic modulus of SiCw/SiCp/Al composites increased with increasing SiCw volume fraction. Dispersion strengthening attained by mechanical alloying was higher than strengthening by SiC whiskers in composites. SiC whiskers of smaller diameter (0.45 μm) show higher strengthening effect than those of larger diameter (1.2 μm). The highest tensile properties were obtained in the SiCw/SiCp/Al duplex composites; tensile strength 565 MPa and elastic modulus 105 GPa at room temperature, and tensile strength 233 MPa at 573 K.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 60 (2), 231-237, 1996

    公益社団法人 日本金属学会

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