Glass Forming Ability And Atomic Size Factor Of Bulk Amorphous Alloys

Bulk amorphous alloys, due to their special physical, chemical and mechanical properties, have found applications in many fields such as aviation, spaceflight, electronics, mechanics and chemical industry. Thus, investigation into bulk amorphous alloys is of both theoretical and practical significance. Amorphous alloys had attracted increasing attention since the late 1980's due to the advent of bulk metallic alloys, readily prepared by copper mould casting method, this field has become a focus and frontier in new materials research. However there has been little progress in recent year regarding new bulk amorphous alloys. This is principally due to the fact that their formation mechanism is largely unknown. This discovery of these amorphous alloys has relied on extensive trials based on empirical rules.In this paper, we surveyed from reported literatures the compositions with high glass forming ability. Based on numerous data, systematic study has been carried out on the relation between the size factor and glass forming ability of different alloys. The atomic size criteria has been suggested and verified by other criteria. Each amorphous alloy system has its own atomic size difference ratio domain. And volume effective ratio of matrix element in amorphous alloys has a liner relation versus its concentration. The aim of this study is to find the effective way and proper composition for designing and optimizing amorphous.