Effects of Zn additions on the solid-state sintering of W-Cu composites

被引:52
作者
Chen, Pingan [1 ]
Luo, Guoqiang [1 ]
Li, Meijuan [1 ]
Shen, Qiang [1 ]
Zhang, Lianmeng [1 ]
机构
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源
MATERIALS & DESIGN | 2012年 / 36卷
基金
中国国家自然科学基金;
关键词
NICKEL-DOPED TUNGSTEN; PARTICLE-SIZE; DENSIFICATION; COPPER; FE;
D O I
10.1016/j.matdes.2011.10.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Full-density W-40 vol%Cu composites are prepared by hot-press sintering in a vacuum at 850 degrees C, as Zn is added as activator. Experiments are conducted to evaluate the effects of Zn additive in the range of 0-20 wt.% on the densification and mechanical properties of W-40 vol%Cu composites. The microstructural characterizations are performed by X-ray diffraction (XRD) and scanning electron microstructure (SEM), and mechanical properties such as Vickers hardness and bending strength are measured, respectively. The relative density increases gradually with increasing of Zn and it achieves 97.9% with a density of 14.53 g cm(-3) at 2.0% Zn. As Zn increases, Vickers hardness increases at the beginning, and then keeps at certain level, finally increases again, the bending strength reaches the maximal value of 960.0 MPa at 14.0%. The results indicate that the sintering temperature is significantly lower with the usage of Zn. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:108 / 112
页数:5
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