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为体现固溶体合金中的溶质原子产生的化学短程序,文章提出了配位数为14的团簇在体心立方(bcc)点阵中的堆垛模式,并建立了基于bcc结构的“团簇+连接原子”结构模型,用团簇成分式[团簇](连接原子)x表述.此模型中,与基体组元具有相对大的负混合焓的溶质原子占据团簇心部,其他原子作为连接或者替代团簇壳层基体原子.1:1结构模型[团簇](连接原子)1由于最大程度地保证了团簇与连接原子的近邻,构成了连接原子最有效的合金化方式.在两个实用bcc固溶体合金体系中,1:1模型指导设计了低V含量的储氢合金[Ti7Cr8]V1和低弹性模量高强度的[Mo(Ti,Zr)14]Nb1合金.
In order to reflect the chemical short procedure of solute atoms in solid solution alloys, the paper presents the stacking pattern of the coordination number 14 clusters in the bcc lattice and the “ Cluster + connected atom ”structure model, expressed in terms of cluster components [cluster] (connected atom) x In this model, the solute atoms with a relatively large negative enthalpy of mixing occupy the centroid of the cluster and other 1: 1 Structural Model [Cluster] (Connection Atomic) 1 The most effective alloying mode of connecting atoms is formed by maximizing the proximity of the cluster to the connected atom In the two practical bcc solid solution alloy systems, the 1: 1 model instructed the design of low V content hydrogen storage alloy [Ti7Cr8] V1 and low modulus high strength [Mo (Ti, Zr) 14] Nb1 alloy.