Mechanical characterization of composites prepared from WC powders coated with Ni rich binders

被引：42

作者：

Fernandes, C. M. ^{[1
]}

Senos, A. M. R. ^{[1
]}

Vieira, M. T. ^{[2
]}

Antunes, J. M. ^{[3
]}

机构：

[1] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[2] Polo 2 Univ Coimbra, Dept Mech Engn, ICEMS, P-3030201 Coimbra, Portugal

[3] Polo 2 Univ Coimbra, Dept Mech Engn, CEMUC, P-3030201 Coimbra, Portugal

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2008年 / 26卷 / 05期

关键词：

sputtering; tungsten carbide; nickel; coated powders; mechanical properties;

D O I：

10.1016/j.ijrmhm.2007.12.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study composite powders of WC and Ni/Fe/Cr were prepared in an innovative way, which consists of the sputter-deposition of the metallic binder onto the tungsten carbide particles. Compacts of coated powders were sintered by conventional vacuum sintering followed by hot isostatic pressing (HIP) to reach almost full densities. In order to evaluate the mechanical properties of reduced specimens size (microcomponents), depth-sensing indentation equipment was used. This method enabled the evaluation of the hardness, H, Young's modulus, E, and the yield stress, sigma(y), in a non-destructive way, using only one sample. For the composites of sputter-coated WC-Ni/Fe/Cr the results showed an effective reduction of H and E due to the properties of Ni and the binder characteristics of the coated powders, such as uniform distribution and nanometer structure. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：491 / 498

页数：8

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