反応焼結によるNi_3Alへのアルミナの複合化 Incorporation of Alumina Particles into Reactively Sintered Ni_3Al

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It is known that Ni and Al powders can be reactively sintered to form Ni<SUB>3</SUB>Al at around 700°C. It was attempted, in the present experiment, to incorporate alumina particles in Ni<SUB>3</SUB>Al during its formation. Alumina particles were dispersed in Ni particles by ball-milling the mixture (mechanical dispersing, MD) and then the Ni particles treated, after compacting with Al powders, were reactively sintered to form Ni<SUB>3</SUB>Al with dispersed alumina particles. As another process, NiO particles were dispersed in Ni powder particles by ball-milling (MD), and the resultant Ni powders were mixed with Al powders, compacted and heated. Curiously, the expected reactions hardly occurred (even the formation of Ni<SUB>3</SUB>Al), even though the reaction temperature was raised to 1000°C; the reason for this is considered to be due to the blocking effect of yielded alumina formed in thin wall-like barriers retarding the diffusion of Ni and Al to form Ni<SUB>3</SUB>Al. The other processes were also tried. For the processes investigated, no apparent effect of gravity, such as segregation of alumina, was observed.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(8), 749-753, 1998-08-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002052601
  • 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
    4540067
  • 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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