High cyclic stability of the elastocaloric effect in sputtered TiNiCu shape memory films

被引：255

作者：

Bechtold, C. ^{[1
]}

Chluba, C. ^{[1
]}

De Miranda, R. Lima ^{[1
]}

Quandt, E. ^{[1
]}

机构：

[1] Univ Kiel, Inst Mat Sci, D-24143 Kiel, Germany

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 09期

关键词：

INDUCED MARTENSITIC-TRANSFORMATION; NITI THIN-FILMS; TI-NI; CU ALLOYS; STRESS; HYSTERESIS; ENERGY; SMA;

D O I：

10.1063/1.4748307

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The elastocaloric effect that occurs during the stress-induced martensitic transformation in shape memory alloys is a promising mechanism in view of solid state cooling applications. It also allows for downscaling to feature sizes in the mu m range, thus, being attractive for micro-cooling applications using thin film materials. In this study, elastocaloric properties of TiNi and TiNiCu films and their relation to functional fatigue were investigated. Both materials show similar effect sizes, their fatigue behavior is however different. While the temperature change in TiNi degrades by a factor of two within 150 cycles, no significant elastocaloric fatigue was found in TiNiCu. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4748307]

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页数：4

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