MAによる金属粒子の扁平化とAl_2O_3複合材料への応用 Study on Flake-Forming Behavior of Metal Powders by MA and Application of the Flaky Metal Powders to Al_2O_3 Composites

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著者

    • 和久 芳春 WAKU Yoshiyuki
    • 宇部興産(株)研究開発本部宇部研究所 Ube Research Laboratory, Corporate Research & Development, Ube Industries, Ltd.
    • 鈴木 道之 SUZUKI Michiyuki
    • 宇部興産(株)研究開発本部宇部研究所 Ube Research Laboratory, Corporate Research & Development, Ube Industries, Ltd.

抄録

New simultaneous toughening and strengthening method for Al<SUB>2</SUB>O<SUB>3</SUB> composites has been reviewed. The flake-forming behavior of refractory metal powders such as Mo, Ta and Nb by MA process, and three-point flexural strength and fracture toughness of Al<SUB>2</SUB>O<SUB>3</SUB> composites reinforced with flaky Mo particles have been investigated. The flake-forming behavior of Mo powders mixed with Al<SUB>2</SUB>O<SUB>3</SUB> powders becomes prominent with increasing Mo particle size, while remaining almost independent of Mo volume percent. The fracture toughness increases with increasing Mo particle size which corresponds to an increase of the flake-forming tendency of these particles. Furthermore, the fracture toughness and flexural strength can be simultaneously improved by increasing the volume percent of flaky Mo particles. The microstructural observations indicate that the improvement in fracture toughness may be due to plastic deformation of Mo particles at a crack tip and crack-deflection or crack-bridging which are accelerated more by the flaky rather than the small. spherical shape.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(6), 705-711, 1996-06-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002012325
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    05328799
  • NDL 記事登録ID
    3976286
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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