Pressureless sintering of in-situ toughened Yb α-SiAlON ceramics by adding seed crystals prepared by combustion synthesis

被引：0
作者：
Guanghua Liu
Kexin Chen
Heping Zhou
Xiaoshan Ning
C. Pereira
J. M. F. Ferreira
机构：
[1] Tsinghua University,Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing
[2] University of Aveiro,Department of Ceramics and Glass Engineering
[3] CICECO,undefined
来源：
Journal of Materials Science | 2006年 / 41卷
关键词：
Polymer; Microstructure; Combustion; Mechanical Property; Phase Transformation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Single-phase Yb α-SiAlON ceramics in-situ toughened by elongated grains were prepared by pressureless sintering, with the crystalline powder prepared by combustion synthesis used as seed crystals. The effects of seed addition on the densification, phase transformation, microstructure development, and mechanical properties of the samples were investigated in detail. From the experimental results, it was found that the added seed crystals could promote the phase transformation and facilitate the growth of elongated grains. By adding seed crystals the fracture toughness of the sintered α-SiAlON ceramics was considerably improved, with no obvious degradation in the bulk density and hardness at the same time.
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页码：1791 / 1796
页数：5
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