Microstructure and Fracture Toughness of Sintered Bodies from Fine SiC Powder and SiC-TiC Composite Powder (特集 ナノ構造制御と新機能発現) Microstructure and Fracture Toughness of Sintered Bodies from Fine SiC Powder and SiC-TiC Composite Powder

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Fine SiC powder and SiC-TiC composite powder were prepared by vapor phase reactions using Si(CH<SUB>3</SUB>)<SUB>4</SUB> and TiCl<SUB>4</SUB>. The particle size was about 200nm. They were hot-pressed at 2000°C in Ar with a sintering aid of Al<SUB>2</SUB>O<SUB>3</SUB> or Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> system. The sintered bodies were densified to 98-99% of theoretical. Rod-like grains were observed in monolithic SiC with both Al<SUB>2</SUB>O<SUB>3</SUB> and Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> system, and the higher fracture toughness was observed in Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> system. The fracture toughness was increased by TiC inclusions although the growth of rod-like SiC grains tended to be retarded. The growth of SiC grains was exaggerated in SiC-TiC composite powder with a large amount of Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> sintering aid, leading to more improved fracture toughness. The present results suggest that the improvement of fracture toughness can be enhanced by combination of rod-like SiC grain growth and TiC inclusion with Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> sintering aid.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(12), 1166-1171, 1998-12-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002053430
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4629454
  • 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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