Characterization of free-standing nanocrystalline Ni55.2Mn24.7Ga19.9Gd0.2 high temperature shape memory thin film
Characterization of free-standing nanocrystalline Ni55.2Mn24.7Ga19.9Gd0.2 high temperature shape memory thin film
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自支撑纳米晶Ni55.2Mn24.7Ga19.9Gd0.2高温形状记忆薄膜的表征
DOI:
10.1016/j.jallcom.2015.11.191
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发表时间:
2016-03
影响因子:
6.2
通讯作者:
Jiehe Sui
中科院分区:
文献类型:
--
作者:
Jian Yao;Xiaohang Zheng;Wei Cai;Jiehe Sui
Nanocrystalline Ni55.2Mn24.7Ga19.9Gd0.2high temperature shape memory thin films had been prepared by the DC magnetron sputtering followed by rapid thermal annealing (RTA). Surface morphology, crystal structure, martensitic transformation behavior and shape memory effect (SME) were systematically investigated. The results showed that as-deposited film displayed a coexistence of amorphous and nanocrystal, while the annealed film was a single phase of seven-layered modulated martensite structure with the grain size about 200–500 nm at room temperature. The annealed film showed one step reversible martensitic transformation with martensitic transformation start temperature of 283 °C. Adjacent lamellar variants exhibited a (202) type Ι twin relationship and well coherent interlamellar interfaces. The annealed Ni55.2Mn24.7Ga19.9Gd0.2thin film displayed a stable SME above 200 °C, which could be used in high temperature field as micro-electro-mechanical-system (MEMS) devices.
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影响因子:
9.4
作者:
H. Y. Kim;M. Mizutani;S. Miyazaki
通讯作者:
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DOI:
10.1016/j.msea.2013.12.081
发表时间:
2014-03
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