采用结构分析和热分析手段研究了Nb对Zr65(Cu0.4Al0.3Ni0.3)35-xNbx(x=0, 3, 5, 6 7) (at%)合金玻璃形成能力和热稳定性的影响,采用铜模吸注法成功制备了非晶基体上均匀分布枝晶相的Zr65(Cu0.4Al0.3Ni0.3)28Nb7块体非晶复合材料.Nb的添加导致合金的过冷液相区间的宽度显著减小,同时,Nb的加入使得合金的原子结构更加无序化,因而合金具有更好的热稳定性.
The effects of Nb element addition on glass formation and thermal stability of Zr65(Cu0.4Al0.3Ni0.3)35-xNbx(x=0, 3,5,6,7) (at%) alloys were investigated through structural and thermal analysis. A composite microstructure with highly uniformly distributed and well-developed crystalline dendrites was successfully prepared by casting the Zr65(Cu0.4Al0.3Ni0.3)28Nb7 melt into a copper mold. The addition of Nb element results in the significant narrowing of supercooled liquid region. Furthermore, the addition of Nb element leads to an increased disorder in atomic structure of the alloy hence increases the thermal stability of the alloy.
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