THE INFLUENCE OF AN ELECTRIC-FIELD ON THE MECHANISM OF COMBUSTION SYNTHESIS OF TUNGSTEN SILICIDES

被引:27
作者
GEDEVANISHVILI, S
MUNIR, ZA
机构
[1] GEORGIAN ACAD SCI, F TAVADZE INST MET, TBILISI 380060, GEORGIA
[2] UNIV CALIF DAVIS, DEPT CHEM ENGN & MAT SCI, DAVIS, CA 95616 USA
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1995.2642
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The synthesis of tungsten silicides by self-propagating combustion has been successfully accomplished under the influence of an electric field. Materials with starting composition ranging from 6 to 30 wt. % Si were investigated by the method of field-activated combustion synthesis (FAGS). A threshold held value was required to initiate a self-sustaining wave; the threshold value depended on composition. It was shown that the level of the applied field can influence the mechanism of silicide formation. The silicide W5Si3 could be formed only at relatively high field values while WSi2 can be formed at any held. The effect of the field on the silicide formation is discussed in terms of its role in liquid phase formation.
引用
收藏
页码:2642 / 2647
页数:6
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