摘要
Ｓｉａｌｏｎ陶瓷在热处理过程中经常发生α－Ｓｉａｌｏｎ→β－Ｓｉａｌｏｎ的相变．晶界中液相的结晶化是导致热处理时α－Ｓｉａｌｏｎ→β－Ｓｉａｌｏｎ相变的原因．这种相交的程度随组份中液相量增加而变大，而且与稀土元素的原子序数有关．对于轻稀土的α－Ｓｉａｌｏｎ材料，这种相变更易发生．本文依据Ｌｎ－Ｓｉ－Ａｌ－Ｏ－Ｎ系统的相关系和α－Ｓｉａｌｏｎ的形成特性对α－Ｓｉａｌｏｎ→β－Ｓｉａｌｏｎ相变的机理作了探讨．
?Sialon→ β-Sialon transformation more or less occurs during heat treatments. The tendency of the transformation increases with increasing liquid phase in the compositions and is also related with the Z-value of the rare-earth elements. For lower La Z-values, this phase transformation is more easy to occur.On the basis of the phase relationships in the Ln-Si-Al-O-N systems and the characteristics of the α-sialon formation, the mechanism of α-Sialon→β-Sialon transformation was discussed.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期269-274,共6页
Journal of Inorganic Materials
