High-porosity NiTi superelastic alloys fabricated by low-pressure sintering using titanium hydride as pore-forming agent

被引：41

作者：

Li, H. ^{[1
]}

Yuan, B. ^{[1
]}

Gao, Y. ^{[1
]}

Chung, C. Y. ^{[2
]}

Zhu, M. ^{[1
]}

机构：

[1] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2009年 / 44卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

POROUS NITI; MARTENSITIC-TRANSFORMATION; PHASE-TRANSFORMATION; BEHAVIOR; MICROSTRUCTURE; MECHANISM;

D O I：

10.1007/s10853-008-3193-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous NiTi shape memory alloys (SMAs) were successfully fabricated by low-pressure sintering (LPS), and the pore features have been controlled by adjusting the processing parameters. The porous NiTi SMAs with high porosity (45%) and large pore size (200-350 mu m) can be prepared by LPS using TiH1.5 as pore-forming agent. These alloys exhibit isotropic pore structure with three-dimensional interconnected pores. The porous NiTi SMA produced by LPS exhibits superelasticity and mechanical properties superior to that by conventional sintering.

引用

页码：875 / 881

页数：7

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