Pore structures of high-porosity NiTi alloys made from elemental powders with NaCl temporary space-holders

被引：38

作者：

Zhao, Xingke ^{[1
]}

Sun, Hongbo ^{[1
]}

Lan, Lan ^{[1
]}

Huang, Jihua ^{[1
]}

Zhang, Hua ^{[1
]}

Wang, Yu ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Naval Acad Armament, Beijing 100073, Peoples R China

来源：

MATERIALS LETTERS | 2009年 / 63卷 / 28期

关键词：

Powder metallurgy; Shape memory materials; Scanning electron microscopy; Microstructure; Porosity; Temporary space-holder; HIGH-TEMPERATURE SYNTHESIS; SHAPE-MEMORY ALLOYS;

D O I：

10.1016/j.matlet.2009.07.069

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The unusual pseudo-elasticity and shape memory effect make NiTi alloys promising energy absorption materials. In the present study, powders of Ti. Ni and NaCl particles were mixed and cold-pressed into green ingots and green ingots were then desalted and sintered in vacuum to form high-porosity NiTi alloy specimens with porosity up to 90%. Microstructure observation shows that two kinds of pores with sizes of 200-400 mu m and 10-50 mu m respectively are well-distributed in these high-porosity NiTi alloys. Characteristics of pores were studied and formation mechanism was discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2402 / 2404

页数：3