系列Zr-Al-Ni-Cu块体非晶合金的晶化行为

Crystallization in A Series Zr-Al-Ni-Cu Bulk Metallic Glass

以等电子浓度和等原子尺寸为判据,设计并制备了6种成分的系列Zr-Al-Ni-Cu块体非晶合金,利用X射线衍射对其中的5种合金在晶化过程中的相转变进行了分析,结果表明,Ni含量较低、Cu含量较高的前两种合金,其晶化相主要以体心四方的Zr2Cu相为主,随着Ni含量升高、Cu含量降低,后三种合金的晶化以体心四方的Zr2Cu相、简单六角Zr6Al2Ni相和面心立方Zr2Ni相等多种晶化相析出为特征。

Six bulk metallic galsses series alloys of Zr-Al-Ni-Cu with different compositions were designed and prepared according to electron concentration constant and atomic size constant criteria.The phase transition were analyzed by x-ray.The results show that crystalline phase of the samples with small Ni content and large Cu content are mostly body centerded tetragonal Zr2Cu。The alloys with large Ni content and small Cu content contain tetragonal Zr2Cu,hexagonal Zr6Al2Ni and face-centered cubic Zr2Ni multiple phases upon annealing.