PARTIAL STRUCTURE FACTORS AND CHEMICAL SHORT-RANGE ORDER IN NI33Y67 AND CU33Y67 METALLIC GLASSES

The three Faber-Ziman partial structure factors as well as the Bhatia-Thornton structure factors of the Ni//3//3Y//6//7 metallic glasses have been evaluated by neutron diffraction using the isotopic substitution method and x-ray diffraction. The chemical ordering is described by a function alpha (R) related to the partial coordination numbers z//i//j(R). The evaluation of alpha //1 by the same method in several Ni//xMt//1// minus //x glasses (x approximately equals 0. 33, Mt equals Y, Ti, Zr, Dy) gives evidence of a relation between the strength of the bonding and the nature of the d transition element alloyed with Ni.