Crystallization kinetics of amorphous NiTi shape memory alloy thin films

被引：68

作者：

Wang, X ^{[1
]}

Vlassak, JJ ^{[1
]}

机构：

[1] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

SCRIPTA MATERIALIA | 2006年 / 54卷 / 05期

基金：

美国国家科学基金会;

关键词：

shape memory alloy thin films; crystallization kinetics; activation energy; grain size;

D O I：

10.1016/j.scriptamat.2005.10.061

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The temperature dependence of the crystallite nucleation and growth rates is measured for amorphous NiTi thin films. Using transmission electron microscopy, crystallites are shown to nucleate homogeneously in the film and to grow in a channeling mode. A mechanism that suppresses heterogeneous nucleation is proposed. By manipulating nucleation and growth rates, grains as large as 60 mu m can be obtained in submicron films. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：925 / 930

页数：6

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