Shrinkage kinetics of nanoscaled W-Cu alloy during hotpressing sintering

被引：0
|
作者：
Xu, Jinlong [1 ]
Zhang, Liying [1 ]
Cui, Feng'e [1 ]
Tan, Yuxin [1 ]
Wu, Chengyi [1 ]
机构：
[1] Mat. Sci. and Eng. Sch., Univ. of Sci. and Technol. Beijing, Beijing 100083, China
来源：
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | 2004年 / 26卷 / 02期
关键词：
Hot pressing - Mechanical properties - Nanostructured materials - Scanning electron microscopy - Sintering - Test facilities;
D O I：
暂无
中图分类号：
TG146.1+1 [铜]; TF811 [铜];
学科分类号：
摘要：
The effect of pressure, gas atmosphere and W particle size on the shrinkage kinetic curve of nano-scaled W-Cu composite powders during hot pressing were studied. The growing of W grains in W-Cu alloys was analyzed. Some mechanical properties were measured. The results show that, using composite nano-powders of W-Cu, the nano-scaled W-Cu alloy in which W particle size is not more than 0.5μm can be obtained through hot pressing in H2 atmosphere and under a high pressure of 75 MPa at low sintering temperatures of 970-1200°C. The relative density of the ultrafine grained alloy can reach 98.8%. The mechanical properties at 500°C greatly exceed those of the conventional W-Cu alloy.
引用
收藏
页码：142 / 147
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