Effect of processing on the morphology of α-sialon grains

被引：17

作者：

Chen, WW ^{[1
]}

Sun, WY ^{[1
]}

Li, YW ^{[1
]}

Yan, DS ^{[1
]}

机构：

[1] Acad Sinica, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

MATERIALS LETTERS | 2000年 / 46卷 / 06期

基金：

中国国家自然科学基金;

关键词：

beta-Si(3)N(4) powder; alpha-sialon; microstructure; elongated grains; grain growth;

D O I：

10.1016/S0167-577X(00)00198-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to explore the effect of processing on the formation of elongated alpha -sialon grains, a mixture of alpha -Si(3)N(4) and beta -Si(3)N(4) (5-40 wt.%) powders combined with variant firing cycles was used for preparing an alpha -sialon doped with Dy(2)O(3). The results showed that the morphology of alpha -sialon grains was more closely relevant to the firing conditions than to the composition of the starting powder. The specimen sintered by gas pressure sintering (GPS) or through heat treatment at 1800 degreesC or 1900 degreesC (for hot-pressed (I FP) specimen) possessed a bimodal microstructure. The mechanism of forming elongated alpha -sialon grains is discussed in the present work. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：343 / 348

页数：6

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