FABRICATION OF SILICON NITRIDE BASED CERAMICS.

被引：0
|
作者：
Trigg, M.B. [1 ]
Ellson, D.B. [1 ]
Stewart, M.W.A. [1 ]
Sinclair, W. [1 ]
MacDonald, A.M. [1 ]
Blicblau, A.S. [1 ]
机构：
[1] CSIRO, Clayton, Aust, CSIRO, Clayton, Aust
来源：
Materials Forum | 1987年 / 10卷 / 03期
关键词：
MICROSCOPIC EXAMINATION - Transmission Electron Microscopy - POWDER METALLURGY - Silicon Compounds - POWDERS - SILICON COMPOUNDS - YTTRIUM COMPOUNDS;
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学科分类号：
摘要：
The hot pressing of silicon nitride based materials, with and without additives, has been investigated. For the production of dense specimens, liquid phase assisted densification was found to be necessary. In the case of beta -sialons, by control of the starting composition, the liquid phase was essentially transient; after fabrication only thin amorphous films were detected at grain boundaries. In contrast, when yttria was employed as a densification aid, multi-phased materials resulted because the beta -silicon nitride structure was unable to accommodate the sintering aid.
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页码：207 / 210
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