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工业合金牌号成分一般满足简单的成分式,我们认为该成分式源自其固溶体中的化学近程有序.本文通过引入用于描述近程有序结构的团簇与连接原子模型,进一步详细阐述面心立方结构Cu-Ni合金的工业牌号成分解析.我们提出的团簇成分式只涉及第一近邻的十二配位立方八面体团簇(方括号部分)和第二近邻的八面体(连接原子部分),理想满足元素间相互作用:富铜端的白铜对应于[Cu-Cu12](Cu,Ni)6团簇式,在富镍端只有蒙乃尔一种工业牌号合金,用团簇式[Ni-Ni12]Cu6~[Ni-Ni12](Cu5Ni)来解析.我们还指出,团簇式对应着特定的价电子总数规律.本工作进一步证实,工业合金牌号背后隐藏着体现固溶体近程有序本质的成分规律.
The composition of industrial alloy grades generally satisfies the simple compositional formula, which we think is derived from the chemical short-range order of its solid solution.This paper further elaborates by introducing the cluster and connected atom model used to describe the short-range ordered structure Face-centered cubic structure of Cu-Ni alloy industrial grade composition analysis.We propose the composition of the cluster only involves the first neighbor twelve coordinated cubic octahedral clusters (square brackets part) and the second nearest neighbor octahedron (connection Atomic part), ideal to meet the interaction between elements: copper-rich copper terminal corresponds to [Cu-Cu12] (Cu, Ni) 6 cluster type, nickel-rich end only Monel an industrial grade alloy, Ni-Ni12] Cu6 ~ [Ni-Ni12] (Cu5Ni) .We also pointed out that the cluster corresponds to a specific law of the total number of valence electrons.This work further confirmed that behind the industrial alloy grades reflect the short-range order of solid solution Essential components of the law.