大块金属玻璃的热稳定性

Thermodynamic Properties of the Bulk Metallic Glass

通过差动热分析（ＤＳＣ）试验测定了Ｚｒ１０６合金的玻璃转变温度Ｔｇ和初始晶化温度Ｔｘ，利用Ｘ射线和透射电子显微镜（ＴＥＭ）对该合金在ＴｇＴｘ温度区间经不同温度和不同时间热处理后试样的显微结构进行了分析，并在ＴｇＴｘ温度区间对该合金进行热锻变形。结果表明，该合金的Ｔｇ和Ｔｘ分别为３２５℃和４７０℃，在低于晶化温度Ｔｘ以下热处理几乎不不发生晶化，其厚度方向的变形量可达２００％。由此得出Ｚｒ１０６具有较大的过冷液相区、较高的热稳定性以及优良的热塑性。

By Differential Scanning Calorimetry (DSC), the transition temperature T g and the primly crystallization temperature T x of the metallic alloy Zr 106 are measured. Their values are 325 ℃ and 470 ℃ respectively. After the material is heated at the different temperature and different time lengths in the temperature interval of T g and T x , the microstructure of the as received material is investigated by using X ray diffraction and Transmission Electron Microscopy, meanwhile, a hot press test is carried out at a specific temperature of 370 ℃ . The results show that the alloy has a large supercooled liquid region and high thermal stability against crystallization, and is excellent in heating plasticity.