On the compressive behaviour of sintered porous coppers with low to medium porosities - Part I: Experimental study
On the compressive behaviour of sintered porous coppers with low to medium porosities - Part I: Experimental study
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DOI：
10.1016/j.ijmecsci.2004.12.011
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发表时间：
2005-04
影响因子：
7.3
通讯作者：
Er-dong Zhang;Bin Wang
中科院分区：
文献类型：
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作者：
Er-dong Zhang;Bin Wang
粉末冶金中的空间保持器方法已用于制备低至中等孔隙率的多孔铜，并且可以很好地控制孔径、形状和分布。研究了多孔铜的压缩性能。虽然发现模量随孔隙率降低，但它似乎对粉末尺寸不敏感。屈服强度与孔隙率呈线性关系，并且与粉末尺寸遵循 Hall-Petch 关系。通过位移控制单轴压缩研究了多孔金属的变形机制。结果表明，在准静态条件下，具有低至中等孔隙率的多孔铜在整个材料中均匀变形，表现得更像固体金属而不是泡沫材料。本文重点对多孔铜的抗压强度进行了实验研究。样品材料的制备和微观结构研究以及本构建模的详细信息将在其他地方介绍。
A space holder method in power metallurgy has been used to prepare porous coppers of low to medium porosities with good control of pore size, shape as well as distribution. The compressive properties of the porous coppers have been investigated. While the modulus is found to decrease in terms of porosity, it appears to be insensitive to powder size. The yield strength shows a linear relationship with porosity, and is found to follow a Hall–Petch relationship with powder size. The deformation mechanism of the porous metals has been studied by a displacement controlled uniaxial compression. Results show that under a quasi-static condition, porous coppers with low to medium porosities deform homogeneously throughout the material, behaving more like a solid metal rather than a foam material. This paper focuses on the experimental study of the compressive strength of the porous coppers. Details of the preparation of sample materials and the microstructure study, as well as constitutive modelling are to be presented elsewhere.