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 T_(0). However, the T_(0) 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 T_(0). In Ti_(50)Au_(50-x)Cr_(x) alloys, the strain glass appears at x = 25, and exhibits a T_(0) of 251 K, while in Ti_(50)Pt_(50-y)Fey alloys, the strain glass takes place at y = 30, and shows a T_(0) of 272 K. Both of them are comparable with the highest T_(0) 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 T_(0) of the strain glass is limited. This work may help to design new strain glass systems with higher T_(0) above ambient temperature.
作者
Shuai Ren
Chang Liu
Wei-Hua Wang
任帅;刘畅;汪卫华(Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Frontier Institute of Science and Technology,State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)
基金
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)。
