Cluster-plus-glue-atom model in bcc solid solution alloys

In the present work we propose the cluster-plus-glue-atom model for bcc solid solutions by establishing periodic packing geometries of CN14 basic clusters in bcc lattice to reflect the idealized chemical short-range order near solute atoms. The model is expressed by cluster formula [CN14 cluster](x), where the cluster center is occupied by a solute having the largest negative enthalpy, mixed with the solvent, and other solute atoms serves as glues or substitute for the solvents in cluster shell. The 1: 1 cluster model [cluster] (glue atom), is specially emphasized that guarantees to a maximum extent the glue-cluster nearest neighbors and hence forms a most efficient configuration. This 1 : 1 model is conducible to the design of a low-V hydrogen-storage [Ti7Cr8]V-1 alloy and a [Mo-1(Ti,Zr)(14)]Nb-1 alloy with low Young's modulus combined with high strength.