无机材料学报

• 研究论文 • 上一篇    下一篇

Ca-α-Sialon的形成特性和显微结构的研究

王佩玲; 贾迎新; 张骋; 孙维莹   

  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:1998-09-03 修回日期:1998-09-25 出版日期:1999-10-20 网络出版日期:1999-10-20

Formation Behavior and Microstructure of Ca-α-Sialon

WANG Pei-Ling; JIA Ying-Xin; ZHANG Cheng; SUN Wei-Ying   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructrue; Shanghai Institute ofCeramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1998-09-03 Revised:1998-09-25 Published:1999-10-20 Online:1999-10-20

摘要: 由热压工艺制备了组份为CaSi12-3Al16-(0.3≤≤2.0)的Ca-α-Sialon陶瓷。本文报道了它的反应过程、相组成、晶胞参数随组份的变化和显微结构的研究结果.研究结果表明,当≥1.0时,制备的Ca-α’样品的物相由α-Sialon和AIN多型体21R组成,其中21R的含量随值的增加而变大.TEM的观察结果与物相分析相符,并进一步揭示了在Ca-α-Sialon样品中长颗粒形貌的α-Sialon的存在.

关键词: Ca, Sialon, 形成特性, 显微结构

Abstract: Ca-α-Sialons for the compositions MxSi3-xAlxOxN16-x with x ranging from 0.3 to 2.0 were prepared by hot-pressing technique. The reaction
sequence, formation behavior, variation of lattice parameters with the compositions and microstructure of Ca-α-Sialon were reported in this paper. The result
showed that the crystalline phase of Ca-α-Sialon in the sintered material consists of α-Sialon and AlN-polytypoid 21R when x is equal to or greater than 1.0 and the 21R content increases as the x-value increases. TEM observation
confirmed the phase assemblages of Ca-α-Sialon samples and further revealed the existence of elongated α’grain in the materials.

Key words: Ca, Sialon, formation behavior, microstructure

中图分类号: