Faceted to non-faceted transition of solid-liquid interface in binary alloys

Jackson's theory on the interfacial roughening transition of pure materials is extended to that of AB binary alloys. In this model, the concept of “quasi-dangling bonds” is introduced. The bonds are produced by the difference between the number of the interfacial component of nearest neighbors of the A atom and that of the B atom. The roughening temperatures calculated from this model coincide with the “faceted-non-faceted” transition temperatures obtained experimentally by Miller and Chadwick and by the present authors.