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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

在Sm-(Nd)-Si-Al-O-N系统中富氮液相区的测定

孙维莹; 陈建新; 贾迎新   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室;上海 200050
  • 收稿日期:1996-03-19 修回日期:1900-01-01 出版日期:1997-06-20 网络出版日期:1997-06-20

Nitrogen-rich Liquid Phase Regions in Sin(Nd)-Si-Al-O-N systems

SUN Weiying; CHEN Jianxin; JIA Yingkin   

  1. The State Key Lab on High Performance Ceramics and Superfine Microstructure; Shanghai Institute ofCeramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1996-03-19 Revised:1900-01-01 Published:1997-06-20 Online:1997-06-20

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摘要： 测定了Sm和Nd-Si-Al－O-N系统在1700℃时，氮含量高于40eq％的液相区范围．结果表明，这两个系统在40eq％氮含量时，都具有较大的液相区；随着氮含量的增加，液相区向富Si方向收缩.在Sm（Nd）－Sialon液相中最高的氮含量为50eq％，比Y－Sialon液相中的氮含量要高得多，后者最大的氮溶解度为30eq％．

关键词: Si3N4, Sialon, 稀土元素, 液相区

Abstract: Liquid phase regions of 1700℃ with nitrogen concentration higher than 40eq% in the systemsof Sm and Nd-Si-Al-O-N were determined. Both systems possess extensive liquid phase regionsat 40eq% N. With incrcasing nitrogen content, the liquid phasc regions contract towards Si-richcompositions. The maximum solubility of nitrogen in the Sm(Nd)-sialon liquids is slightly above30eq%, wihch is much higher than that in Y-sialon liquid, of which the highest nitrogen concentration of slightly above 30eq% was determined.

Key words: Si3N4, Sialon, rare earth elements, liquid phase region