A low temperature synthesized NbC as grain growth inhibitor for WC-Co composites

被引：46

作者：

Da Silva, AGP ^{[1
]}

De Souza, CP

Gomes, UU

Medeiros, FFP

Ciaravino, C

Roubin, M

机构：

[1] Univ Fed Rio Grande Norte, BR-59072970 Natal, RN, Brazil

[2] Univ Toulon & Var, LPCM3, Lab Phys Chim Mat, La Garde, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 293卷 / 1-2期

关键词：

niobium carbide; WC grain growth inhibition; hardmetal;

D O I：

10.1016/S0921-5093(00)00993-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Niobium carbide can be used to inhibit WC grain growth in hardmetal. The performance of a NbC powder produced at low temperature by solid-gas reaction (an experimental powder) as WC grain growth inhibitor is compared with that of a commercial NbC powder. It is verified that NbC effectively inhibits heterogeneous WC coarsening. This results in an increase in hardness. The commercial and experimental NbC powders exhibit a comparable performance in inhibiting the WC grain coarsening, in spite of a significant difference in particle size and shape. The commercial NbC powder is very fine while the experimental one is coarse and porous, but its crystallites are finer than those of the commercial product. The milling procedure used to prepare the alloys is able to reduce the particle size of the experimental NbC, and thus guarantee a dispersion of the particles with a quality level comparable to that found for the alloy prepared with the commercial NbC. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：242 / 246

页数：5

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