Niobium Wires as Space Holder and Sintering Aid for Porous NiTi

被引：12

作者：

Bansiddhi, Ampika ^{[1
]}

Dunand, David C. ^{[2
]}

机构：

[1] Kasetsart Univ, Dept Mat Engn, Bangkok 10900, Thailand

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

ADVANCED ENGINEERING MATERIALS | 2011年 / 13卷 / 04期

基金：

美国国家科学基金会;

关键词：

SHAPE-MEMORY ALLOYS; FABRICATION; IMPLANTS; FOAMS;

D O I：

10.1002/adem.201000241

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When NiTi powder compacts containing Nb wires are heated above 1170 degrees C, each Nb wire reacts with adjacent NiTi powders to form a eutectic liquid which wicks into the space between the remaining NiTi powders. This creates a macropore at the location of the Nb wire while eliminating the microporosity between NiTi powders which is filled with a NiTi/Nb eutectic phase after solidification. This novel method produces - in a single step and without applied pressure - a dense NiTi matrix with elongated pores suitable for shape memory or superelastic applications such as bone implants, dampeners and actuators.

引用

页码：301 / 305

页数：5

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