Effects of pore size on the mechanical properties of three-dimensionally ordered macroporous nickel

被引：18
作者：
Li, Zhenyu [1 ]
Yang, Lili [2 ]
Li, Yang [1 ]
Yang, Yongning [1 ]
Zhou, Changhai [1 ]
Ding, Yanbo [3 ]
Zhao, Jiupeng [3 ]
Li, Yao [1 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Sch Transportat Sci & Engn, Harbin 150090, Peoples R China
[3] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Peoples R China
来源：
MATERIALS & DESIGN | 2013年 / 45卷
基金：
中国国家自然科学基金;
关键词：
PHOTONIC CRYSTALS; ELECTRODEPOSITION; SILICA;
D O I：
10.1016/j.matdes.2012.09.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical properties of three-dimensionally ordered macroporous (3DOM) nickel with pore sizes between 312 and 1200 nm are explored under nanoindentation and microhardness tester. This paper demonstrates that the hardness and elastic modulus of 3DOM Ni increase as the pore size decreases. The phenomenon that "smaller is stronger'' is mainly due to the combined effects of sharing the load with more and smaller pore cells, the decrease of the moment upon the small pore wall and larger surface area to volume ratio. The deformation process of 3DOM Ni is pore wall "fracture-dominated'' under nanoindentation while "bending-dominated'' under microhardness tester. The results demonstrate how pore size control at the microstructural scale can tailor hardness and elastic modulus and hold great potential for the design and application of new 3DOM materials and devices. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：52 / 55
页数：4
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