Preparation and sintering of Ni-coated Si3N4 composite powders

被引：22
|
作者：
He, WB [1 ]
Zhang, BL [1 ]
Zhuang, HR [1 ]
Li, WL [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2005年 / 31卷 / 06期
关键词：
silicon nitride; nickel; molybdenum carbide;
D O I：
10.1016/j.ceramint.2004.09.008
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ni-coated Si3N4 composite powders were prepared successfully via electroless plating by using sodium hypophosphate (NaH2PO2) as reducing agent. The Ni coating layers contained 12 wt.% phosphor and were dominantly amorphous with a thickness of 20-60 nm. The sintering properties of Ni-Si3N4 composite were improved by adding Mo2C into Si3N4 powders, in which Mo2C formed liquid to improve the alpha-beta transformation of Si3N4, and MoSi2 converted into MoSi2 after sintering. The composite powders were densified by hot-pressing at 1600 degrees C. The final crystal phases of the sintered samples were Si3N4, Ni and MOSi2. (c) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：811 / 815
页数：5
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