Extraordinary damping of Ni-Ti double layer films

被引：20

作者：

Craciunescu, C ^{[1
]}

Wuttig, M ^{[1
]}

机构：

[1] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA

来源：

THIN SOLID FILMS | 2000年 / 379卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

damping; Ni-Ti; Si cantilever; martensite;

D O I：

10.1016/S0040-6090(00)01556-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An unusually high damping peak has been detected in martensite/martensite double layer Ni-Ti shape memory films. The double layer consisted of two 1-mum thick layers deposited successively at 250 and 385 degreesC from the same target onto a 100-mum Si cantilever substrate. Around room temperature, the individual layers consisted of rhombohedral and monoclinic martensite, respectively. The maximum damping of the martensite/martensite/Si cantilever, occurring at 50 degreesC, equaled Q(-1) = 1.4 x 10(-4) which corresponds to a damping of the martensite/martensite composite of 11%. It is proposed that this extraordinary damping is caused by the interactive formation of B19' and R martensites in the stress coupled layers. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：173 / 175

页数：3

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