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Microstructure of (Y + Sm)–α-sialon with a-sialon seeds

Published online by Cambridge University Press:  31 January 2011

Wei-wu Chen ,
Wei-ying Sun ,
Ya-wen Li  and
Dong-sheng Yan
Wei-wu Chen
Affiliation:
The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, People's Republic of China
Wei-ying Sun
Affiliation:
The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, People's Republic of China
Ya-wen Li
Affiliation:
The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, People's Republic of China
Dong-sheng Yan
Affiliation:
The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, People's Republic of China
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Abstract

(Y + Sm)–α-sialon compositions with and without α-sialon seeds were hot-pressed at 1800 °C for 1 h and then heat treated at 1800 °C for 4 h. The effect of α-sialon seeds on the microstructures of (Y + Sm)–α-sialon ceramics was studied by scanning electron microscopy. The results showed that hot-pressed α-sialon ceramics with elongated grains can be fabricated by adding 10 wt% seeds. Through heat treatment, the seed-free composition could also develop into a similar microstructure with big elongated grains dispersed in a fine matrix.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 10 , October 2000 , pp. 2223 - 2227
Copyright
Copyright © Materials Research Society 2000

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