STUDY OF GLASS FORMING ABILITY PARAMETERS OF Mg-Ni-Pr-BASED METALLIC GLASSES

Abstract

Knowledge of Glass forming Ability (GFA) of metallic glasses is of great importance as it gives an insight of a better Glass former. Number of GFA parameters like Gibb’s free energy difference ∆G, ∆S, ∆H, η, γ, γm, Q, Trg (=Tg/Tl) etc. are calculated and compared for Mg-Ni-Pr- based metallic glass forming alloys to predict which parameter describes the best GFA criterion. On the basis of these parameters the excellent glass forming composition is identified. Also the GFA parameters of Mg-Ni-Pr- based alloys are studied in air and argon atmosphere. Present work suggests that ∆G is the best GFA criterion and Mg-Ni-Pr- based metallic glassy alloys can be successfully fabricated in air due to its high oxidation resistance ability.