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无机材料学报

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α-Sialon-AlN多型体复相陶瓷的微观结构特性

陈卫武; 孙维莹; 严东生   

  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:1998-11-25 修回日期:1999-02-10 出版日期:1999-12-20 网络出版日期:1999-12-20

Microstructural Characteristic of α -AlN-polytypoids Multi-phase Sialon

CHEN Wei-Wu; SUN Wei-Ying; YAN Dong-Sheng   

  1. State key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1998-11-25 Revised:1999-02-10 Published:1999-12-20 Online:1999-12-20

PDF (PC)

839

被引次数

17

摘要： 通过XRD、SEM、EDS等方法，研究了添加Y2O3和Sm2O3的α－Sialon－AlN－多型体复相组份在热压过程中的致密化、相组成及微观结构的变化．结果表明，复相Sialon组份，AlN－多型体先于α－Sialon形成，且易发生偏聚，很难均匀分散在α－Sialon中，但是与通常不一样，α－Sialon易发育成长颗粒状．文中对长颗粒状的α－Sialon的形成进行了讨论．

关键词: α－Sialon, AlN－多型体, 复相陶瓷, 微观结构

Abstract: The densification behavior, reaction sequence and microstructural development of (Y+Sm) α -AlN-polytypoids multi-phase Sialon were studied by XRD, SEM and EDS. The results show that the AlN-polytypoids form earlier than α-Sialon and segregate together. The α-Sialon develops into elongated grains in this multi-phase Sialon. The mechanism of elongated α-Sialondeveloped was discussed.

Key words: α-Sialon, AlN-polytypoids, multi-phase ceramics, microstructures

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