结晶
材料科学
体积热力学
无定形固体
玻璃化转变
焓
非晶态金属
热力学
压缩(物理)
冶金
分析化学(期刊)
结晶学
复合材料
合金
化学
聚合物
色谱法
物理
作者
A.H. Cai,Xiang Xiong,Y. Liu,Wei An,Guohui Zhou,Yang Luo,T.L. Li,Xing Sheng Li
标识
DOI:10.1016/j.jnoncrysol.2013.07.023
摘要
The structural and thermal sensitivity of Cu(60 − x)Zr(30 + x)Ti10 (x = 0, 5, and 10 at%) amorphous alloys to pressure was investigated. The structural sensitivity to pressure decreases with increasing Cu content, resulting in the decrease of the deforming and casting capacities. The increase of the crystallization enthalpy is positively related with the increase of the free volume. The activation energies for the glass transition (Eg) and the crystallization (Ex) increase with increasing Cu content for the as-cast and compressed amorphous alloys, but decrease after the compression. The more the Cu content or the increment of the free volume is, the more the decrement of the Eg. Thus the increase of the free volume significantly influences the glass transition and the crystallization. Moreover, the effect of the pressure on the glass transition depends stronger on the change of the free volume than on the magnitude of the free volume.
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