无机材料学报

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稀土氧化物对β-SiAlON陶瓷的致密化和力学性能的影响

陈红光; 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开放实验室;上海 200050
  • 收稿日期:1997-01-14 修回日期:1997-03-05 出版日期:1998-02-20 网络出版日期:1998-02-20

Effect of Rare Earth Oxides on Densification and Mechanical Properties in β-SiAION Ceramics

CHEN Hong-Guang; SUN Wei-Ying   

  1. State Key Lab on High Pedermancc Ceramics and Superfine Micrstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1997-01-14 Revised:1997-03-05 Published:1998-02-20 Online:1998-02-20

摘要: 在Dy-β-SiAlON组份中,分别以Sm3+和Y3+部分取代Dy3+,观察混合稀土添加剂对致密化行为、显微结构和力学性能的影响.研究结果表明,以Sm3+取代Dy3+有助于材料的致密化和力学性能的提高,而以Y3+取代Dy3+则没有明显的效果.研究中还发现,稀土元素Sm3+的加入,有助于抑制β’晶粒生长.

关键词: 稀土元素, β-SiAlON, 致密化, 显微结构, 力学性能

Abstract: The effects of mixed rare earth oxides on densification, microstructure and mechanical properties Dy-β-SiAlON ceramics were investigated. It was found that the densities and mechanical properties were improved while Dy3+ was half replaced by Sm3+, but there was no such effect found while replaced by Y3+. It was also observed that the growth of β-SiAlON grains was restrained while Sm2O3 was added.

Key words: rare earth oxide, β-SiAlON, densification, microstructure, mechanical properities

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