摘要
利用准晶的共轭结构模型构造出了Zr 基非晶合金中准晶相的原子结构模型,用递归方法研究了合金元素对非晶晶化过程的影响。结果表明:Zr 基非晶合金析出的准晶相存在Zr6Ni,Ni6Zr 2 种结构, Ni6Zr 结构优先析出;合金元素Ag,Pd,Pt,Au 固溶于准晶中时,占据Cu,Ni 原子的位置,增大近邻原子间的相互作用,这从电子理论角度解释了合金元素Ag,Pd,Pt,Au 稳定地促进二十面体准晶(I)相析出的事实。
The atom structure models of two kinds of quasicrystal in Zr-base amorphous alloys were set up by using the conjugate structure model of quasicrystals. The effects of alloying elements on the crystallization behavior of Zr-base amorphous alloys were investigated by recursion method. The results show that two kinds of quasicrystal -Zr6Ni, Ni6Zr clusters are exist in Zr-base amorphous alloys, and alloying elements (Ag, Pt, Pd, Au) occupy the sites of Ni ( or Cu) in the quasicrystal phase, and that increase the interaction of neighbor atoms, which explains the fact of alloying elements (Ag, Pd, Pt, Au) promoting the stable growth of the quasicrystal phase.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第3期389-392,共4页
Rare Metal Materials and Engineering
基金
国家重点基础研究发展规划项目(G2000067201)
国家高技术研究发展规划项目(2001AA331010)
关键词
块状Zr基非晶合金
准晶相
结晶
Zr-base amorphous alloy
quasicrystal
crystallization
