Effect of Nucleation and Growth of Pores, and Solidification Mode on Pore Structure and Distribution of Lotus-type Porous Cu

被引：0
|
作者：
Li F. [1 ]
Li Z. [2 ,3 ]
Tian J. [3 ]
Xie M. [3 ]
Zhu S. [3 ]
Chen J. [3 ]
机构：
[1] City College, Kunming University of Science and Technology, Kunming
[2] Aviation College, Kunming University of Science and Technology, Kunming
[3] State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming
来源：
Li, Zaijiu (lzj@ipm.com.cn) | 1600年 / Chinese Journal of Materials Research卷 / 31期
关键词：
Gasar; Lotus-type porous Cu; Metallic materials; Pore growth; Pore nucleation; Solidification model;
D O I：
10.11901/1005.3093.2016.431
中图分类号：
学科分类号：
摘要：
The effect of pore nucleation,pore growth and solidification mode of matrix on pore structure and distribution of lotus-type porous Cu were investigated. It is difficult to obtain an ordered pore structure when the matrix is a region of columnar transition. An ordered pore structure could be obtained only when the matrix transforms to columnar grains with increase of pore length and circularity. The pore distribution moved from the grain boundaries to the interior of grain with increasing gas pressure. The average pore diameter decreased and the pore density increased due to decrease of activation energy and increased rate of nucleus formation. Due to slight depressions at grain boundaries regions at the solid/liquid interface, the pore nucleation is favored at grain boundaries and thus the average pore diameter in the grain boundaries is larger than that of in the grains. © All right reserved.
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页码：641 / 649
页数：8
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