Combustion synthesis of WC powder in the presence of alkali salts

被引：30

作者：

Nersisyan, HH ^{[1
]}

Won, HI ^{[1
]}

Won, CW ^{[1
]}

机构：

[1] Chungnam Natl Univ, Rapidly Solidified Mat Res Ctr RASOM, Taejon 305764, South Korea

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 29-30期

关键词：

combustion synthesis; tungsten carbide; molten salt; alkali metal chloride; diffusion; microstructure;

D O I：

10.1016/j.matlet.2005.07.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper deals with the formation of tungsten carbide sub-micrometer powders from WO3+Mg+C+sodium salts (NaCl, Na2CO3) system by combustion synthesis technique. The powders were characterized by XRD and FESEM. X-ray data demonstrate the superiority of the NaCl+Na2CO3 combined mixture in the WC formation process. Single phase, sub-micrometer WC powders were synthesized at temperatures as low as 1600 degrees C. The roles of sodium salts in combustion process were discussed and chemical mechanism of WC formation was proposed. WC powder produced by salt-assisted combustion synthesis technique has a size 0.2-3 mu m, crystalline shape and low agglomeration degree. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：3950 / 3954

页数：5

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