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使用高能同步加速器辐射,当锆基金属玻璃在真空中温度达到848 K的Linkam热台下退火后,发现了亚稳相。通过同步加速器辐射的方法记录了亚稳相的形成和转换过程。根据粉末衍射和透射电镜分析,在晶化过程中识别出的亚稳相是Zr_3Al_2结构型。采用体积分数的函数方法,通过三维衍射图样试验论证了Zr_3Al_2型亚稳相的结构,并用数学法描述出来。对Zr_3Al_2亚稳相的识别有助于理解金属玻璃的簇结构。
Using high-energy synchrotron radiation, a metastable phase was found when zirconium-based glass was annealed under a Linkam hot stage of 848 K in vacuum. The method of synchrotron radiation records the formation and conversion of metastable phases. According to the analysis of powder diffraction and transmission electron microscopy, the metastable phase identified in the crystallization process is the Zr_3Al_2 structure. The structure function of Zr_3Al_2 metastable phase is demonstrated by three-dimensional diffraction pattern experiment using volume fraction function method, and it is described mathematically. The recognition of metastable Zr_3Al_2 phase helps to understand the cluster structure of metallic glass.