无机材料学报

• 研究论文 • 上一篇    下一篇

Nb2O5对ZTM-Al2O3性能及ZrO2增韧机制的影响

靳喜海1; 高濂1; 阚艳梅2; 陈玉如2; 袁启明2   

  1. 1. 中国科学院上海硅酸盐研究所, 上海 200050; 2. 天津大学材料科学与工程学院, 天津 300072
  • 收稿日期:1999-11-23 修回日期:1999-12-28 出版日期:2000-12-20 网络出版日期:2000-12-20

Influence of Nb2O5 on the Mechanical Performances and Toughening Mechanism of ZrO_2 in ZTM-Al2O3

JIN Xi-Hai1; GAO Lian1; KAN Yan-Mei2; CHEN Yu-Ru2; YUAN Qi-Ming 2   

  1. 1.State Key Lab of High Performance Ceramics and Superfine Structure; Shanghai Instittute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; School of Material Science and Engineering, Tianjin University, Tainjin 300072, China
  • Received:1999-11-23 Revised:1999-12-28 Published:2000-12-20 Online:2000-12-20

摘要: 探讨了Nb对ZTM-Al的性能和ZrO在瓷体中增韧机制的影响.发现Nb的引入可明显提高瓷体中m-ZrO含量而降低t-ZrO含量,材料的机械性能也随Nb添加量的增大出现了显著的改善,并且有韧性的平方正比于m-ZrO含量的关系.m-ZrO含量的增加强化了微裂纹增韧是材料性能改善的原因.

关键词: Nb2O5, mullite, ZrO2, 微裂纹增韧

Abstract: The paper discussed the influence of Nb2O5 on the mechanical properties of ZTM Al2O3 and the toughening mechanisms of ZrO2 in the material. The results show that Nb2O5 can remarkably increase the m-ZrO2 content in the ceramics while decreasing the t-ZrO2 content, The mechanical properties can be greatly improved by Nb2O5 addition, and the square of the toughness is in proportion to m-ZrO2 content. Microcrack toughening enhanced by increasing m-ZrO2 content is the main factor contributing to the improvement

Key words: Nb2O5, mullite, ZrO2, microcrack toughening

中图分类号: