| High temperature strain glass in Ti–Au and Ti–Pt based shape memory alloys |
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| 引用本文： | 任帅,刘畅,汪卫华.High temperature strain glass in Ti–Au and Ti–Pt based shape memory alloys[J].中国物理 B,2021(1). |
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| 作者姓名： | 任帅 刘畅 汪卫华 |
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| 作者单位： | Institute of Physics;Frontier Institute of Science and Technology |
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| 基金项目： | Project supported by China Postdoctoral Science Foundation(Grant No.2019M650880);the National Natural Science Foundation of China(Grant Nos.51901243,61888102,and 11790291);the Natural Science Foundation of Guangdong Province,China(Grant No.2019B030302010);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB30000000)。 |
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| 摘 要： | Strain glass is a frozen short-range strain ordered state found in shape memory alloys recently, which exhibits novel properties around the ideal glass transition temperature T0. However, the T0 of current strain glass systems is still very low, limiting their potential applications and experimental studies. In this paper, we reported two new strain glass systems with relatively high T0. In Ti50Au50-xCrx alloys, the strain glass appears at x = 25, and exhibits a T0 of 251 K, while in Ti50Pt50-yFey alloys, the strain glass takes place at y = 30, and shows a T0 of 272 K. Both of them are comparable with the highest T0 value reported so far. Moreover, the phase diagrams of main strain glass systems in Ti-based alloys were summarized. It is found that the influence of the martensitic transformation temperature of the host alloy on the T0 of the strain glass is limited. This work may help to design new strain glass systems with higher T0 above ambient temperature.
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| 关 键 词： | shape memory alloys martensitic transformation strain glass glass transition temperature |
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