ケイ砂とアルミニウムから製造した窒化物の熱間加圧焼結に及ぼすステアタイト混入の影響

DOI Web Site Web Site

書誌事項

タイトル別名
  • The Effects of Steatite Contamination on Hot-pressing of Nitride Prepared from Siliceous Sand and Al Powder
  • ケイサ ト アルミニウム カラ セイゾウシタ チッカブツ ノ ネッカン カアツ

この論文をさがす

抄録

The effects of steatite contamination from ball milling media on hot-pressing of nitride prepared from siliceous sand and Al powder were studied by means of shrinkage measurement during hot-pressing, X-ray diffraction method and scanning electron microscopic observation.<br>The hot-pressing experiments were carried out at the temperature range of 1600° to 1880°C under pressures of 100 to 400kg/cm2 for 1h. The microstructure of the hot-pressed specimen obviously showed that the liquid phase sintering occurred in the specimen contaminated with steatite. The steatite in the specimen gave cordierite which formed reactive liquid in hot-pressing through reaction with α-Al2O3. The as-nitrided solid prepared from siliceous sand and Al powder needed higher temperature and higher pressure for densifica tion compared with the specimens contaminated with steatite.<br>It was considered to be due to the absence of liquid phase in hot-pressing of the asnitrided solid.<br>From microscopic observation and densification curves, the densification of the as-nitrided solid seemed to proceed through the following mechanisms; grain boundary sliding in the initial stage of densification, diffusion process in solid state in the intermediate stage.

収録刊行物

  • 窯業協會誌

    窯業協會誌 87 (1010), 505-511, 1979

    公益社団法人 日本セラミックス協会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ