Proton irradiation induced phase transformation in Ni-Mn-Ga thin films

R. Ning; Z.P. Yang; Z.Y. Gao; X.Z. Cao; W. Cai

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Proton irradiation induced phase transformation in Ni-Mn-Ga thin films

机译：Ni-Mn-Ga薄膜的质子辐射诱导相变化

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This paper reports the martensitic transformation of NiMnGa film induced by proton irradiation, which is of great significance for evaluating the reliability of NiMnGa film. Ni-Mn-Ga thin films are spotlighted as next-generation alternatives to currently used micro-actuators in the MEMS system for aircraft. Nonetheless, their potential applications are hindered by the stability under proton irradiation in the space. In the present manuscript, the microstructure evolutions of Ni_(50)Mn_(25)Ga_(25) thin films are investigated under various proton irradiation doses. A large number of point defects are introduced into the thin films at the irradiation dose over 1 × 10~(16) p/cm~2 as indicated by the positron annihilation spectrum. And the type of defects remains the same after irradiation Consequently, 7 M martensite is formed on the surface of austenitic Ni_(50)Mn_(25)Ga_(25) thin films driven by the internal stress filed based on the GI-XRD and TEM observations.

机译：本文报道了质子辐射诱导的Nimnga膜的马氏体转化，这对于评估Nimnga薄膜的可靠性具有重要意义。 Ni-Mn-Ga薄膜被认为是目前在MEMS系统中使用的下一代替代品的下一代替代品。尽管如此，它们的潜在应用受到空间质子辐照下的稳定性的阻碍。在本发明的稿件中，在各种质子辐射剂量下研究了Ni_（50）Mn_（25）Ga_（25）薄膜的微观结构演进。如正电子湮没光谱所示，将大量点缺陷引入照射剂量的薄膜上，以上超过1×10〜（16）p / cm〜2。在辐照后，缺陷的类型保持不变，在由基于Gi-XRD和TEM的内部应力驱动的奥氏体Ni_（50）Mn_（25）Ga_（25）Ga_（25）Ga_（25）薄膜的表面上形成7米马氏体观察。

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《Materials Science and Engineering》 |2021年第4期|115078.1-115078.7|共7页
作者
R. Ning; Z.P. Yang; Z.Y. Gao; X.Z. Cao; W. Cai;
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Science and Technology on Materials Performance Evaluation in Space Environment Laboratory School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China;

Science and Technology on Materials Performance Evaluation in Space Environment Laboratory School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China;

Science and Technology on Materials Performance Evaluation in Space Environment Laboratory School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China;

Key Laboratory of Nuclear Radiation and Nuclear Energy Technology Institute of High Energy Physics of the Chinese Academy of Sciences Beijing 100049 China;

Science and Technology on Materials Performance Evaluation in Space Environment Laboratory School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China;

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正文语种 eng
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Ni-Mn-Ga film; Proton irradiation; Microstructure; Point defects;

机译：Ni-Mn-GA薄膜;质子辐照;微观结构;点缺陷;

Proton irradiation induced phase transformation in Ni-Mn-Ga thin films

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