High temperature strain glass transition in defect doped Ti–Pd martensitic alloys
High temperature strain glass transition in defect doped Ti–Pd martensitic alloys
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DOI：
10.1002/pssb.201350360
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Yumei Zhou;D. Xue;Xiangdong Ding;K. Otsuka;Jun Sun;X. Ren
中科院分区：
文献类型：
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作者：
Yumei Zhou;D. Xue;Xiangdong Ding;K. Otsuka;Jun Sun;X. Ren
应变玻璃合金在其玻璃化转变温度T0附近表现出新颖的功能；但对于 TiNi 基应变玻璃合金来说，T0 太低，限制了它们的潜在应用。因此，开发高T0应变玻璃合金具有重要的实际意义。本研究通过选择具有高温马氏体相变的TiPd作为主体合金，并掺杂不同种类的点缺陷来替代Pd，开发了几种常温T0应变玻璃合金。通过比较TiPd基和TiNi基应变玻璃合金，发现应变玻璃合金的T0是由其基体合金的马氏体转变温度控制的，没有缺陷掺杂。最后，我们的结果表明应变玻璃合金也是有前途的应用阻尼材料，因为它们的转变阻尼峰值对冷却/加热速率不敏感并且也没有热滞后。
Strain glass alloys exhibit novel functionalities around their glass transition temperatureT0; but T0 is too low for TiNi‐based strain glass alloys, restricting their potential applications. It is thus of practical importance to develop high T0 strain glass alloys. In the present study, several ambient‐temperature T0 strain glass alloys were developed, by selecting TiPd with high temperature martensitic transformation as the host alloy and doping different kinds of point defects to substitute Pd. By comparing TiPd‐based and TiNi‐based strain glass alloys, it is found that T0 of strain glass alloys is controlled by the martensitic transformation temperature of its host alloys without defect doping. Finally, our results suggest that strain glass alloys are also promising damping materials for applications, as their transition damping peak is insensitive to the cooling/heating rate and is also thermal hysteresis free.