添加燃烧合成晶种SPS烧结Yb α-SiAlON陶瓷

无机材料学报

添加燃烧合成晶种SPS烧结Yb α-SiAlON陶瓷

刘光华¹; 陈克新¹; 周和平¹; 郭俊明^1,2; 宁晓山¹

1. 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室, 北京 100084; 2. 红河学院化学系，蒙自 661100

收稿日期:2004-04-06 修回日期:2004-09-20 出版日期:2005-05-20 网络出版日期:2005-05-20

Fabrication of Yb α-SiAlON Ceramics by SPS with Crystal Seeds Prepared through Combustion Synthesis

LIU Guang-Hua¹; CHEN Ke-Xin¹; ZHOU He-Ping¹; GUO Jun-Ming^1,2; NING Xiao-Shan¹

1. Department of Materials Science & Engineering; The State Key Laboratory of New Ceramics & Fine Processing; Tsinghua University; Beijing 100084; China; 2. Department of Chemistry; Honghe University; Mengzi 661100; China

Received:2004-04-06 Revised:2004-09-20 Published:2005-05-20 Online:2005-05-20

摘要/Abstract

摘要： 通过燃烧合成技术制备单相Yb α-SiAION粉体,然后作为晶种添加到原料中利用SPS技术快速烧结出致密Yb α-SiAION陶瓷.对SPS烧结过程中试样的致密化、相转变和形貌发育进行了研究,并探讨了添加晶种对烧结产物相组成和微观形貌的影响.实验结果表明, SPS可使试样迅速完成致密化过程,适当的烧结温度和保温时间可以促进相转变和晶粒发育. 添加晶种,不仅促进了相转变过程,而且可以在烧结体内获得柱状晶,有助于改善材料的韧性.

关键词: Yb α-SiAION, 燃烧合成, SPS, 柱状晶

Abstract: Single-phase Yb α-SiAlON was prepared through combustion synthesis, then the as-synthesized powder was added as crystal seeds for fabrication of Yb α-SiAlON ceramics by SPS. The densification process, phase transformation, as well as microstructure development were studied, and effects of seed addition on the phase composition and microstructure of the sintered ceramics were also discussed. The experimental results show that the samples can be densified very quickly by SPS, and proper temperature and dwelling time are beneficial to phase transformation and grain growth. Seed addition accelerates the phase transformation as well as results in the formation of rod-like crystals, which is helpful to improve the toughness of ceramics.

Key words: Yb α-SiAlON, combustion synthesis, SPS, rod-like crystal

中图分类号:

TQ173

刘光华,陈克新,周和平,郭俊明,宁晓山. 添加燃烧合成晶种SPS烧结Yb α-SiAlON陶瓷[J]. 无机材料学报.

LIU Guang-Hua,CHEN Ke-Xin,ZHOU He-Ping,GUO Jun-Ming,NING Xiao-Shan. Fabrication of Yb α-SiAlON Ceramics by SPS with Crystal Seeds Prepared through Combustion Synthesis[J]. Journal of Inorganic Materials.

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