ホウ化物系硬質セラミックスの焼結および摩擦摩耗に関する研究 Sintering and Tribology of Boride Hard Materials

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著者

    • 西山 勝廣 NISHIYAMA Katsuhiro
    • 東京理科大学理工学部機械工学科 Department of Mechanical Engineering, Faculty of Science and Technology, Science University of Tokyo

抄録

An experimental and analytical studies for obtaining high performance ceramics of TiB<SUB>2</SUB>-and B<SUB>4</SUB>C-based hard materials are inclusively presented in this paper. An improvement of sinterability and mechanical properties of TiB<SUB>2</SUB> and B<SUB>4</SUB>C hard materials are achieved by using ultra-fine powders and sintering aids. First results obtained showed that the ultra-fine and size-controlled powders of TiB<SUB>2</SUB> can be produced by magnesium-thermic reduction method. Fabrication processing of TiB<SUB>2</SUB> using pressureless sintering was also investigated with special emphasis on the effect of doping Ni<SUB>7</SUB>Zr<SUB>2</SUB>, Ni<SUB>3</SUB>B, NiB, and Co. The pore-free sintered compacts can be obtained by the addition of extreme small amount of Ni<SUB>7</SUB>Zr<SUB>2</SUB>. Moreover, sintering behavior and mechanical properties of B<SUB>4</SUB>C-TiB<SUB>2</SUB> composites were investigated by pressureless sintering up to 2100°C in vacuum, resulting in a maximum density of 99% of the theoretical density. Tailored microstructures may be obtained in composites on the B<SUB>4</SUB>C-TiB<SUB>2</SUB> system. The importance of microstructural features, resulting from precipitation phases from supersaturated solid solutions, for the improvement of sinterability and mechanical properties, is also addressed. Finally, sliding friction experiments were conducted on hard materials. A friction coefficient of B<SUB>4</SUB>C-TiB<SUB>2</SUB> as low as 0.1 can be obtained because the oxidation of btmde produces a trapped-lubricating, glassy phase of boron oxide on the sliding surfaces.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(4), 464-471, 1996-04-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002011927
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    3954809
  • 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  CJP引用  NDL  J-STAGE 
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