Glass Formation Criterion for Various Glass-Forming Systems

Abstract

A conceptual approach to evaluate glass-forming ability for various glass-forming systems has been proposed from a physical metallurgy point of view. It was found that the glass-forming ability for noncrystalline materials was related mainly to two factors, i.e., $1/(T_{\mathrm{g}}+T_{\mathrm{l}})$ and $T_x$ (wherein $T_x$ is the onset crystallization temperature, $T_{\mathrm{g}}$ the glass transition temperature, and $T_{\mathrm{l}}$ the liquidus temperature), and could be predicated by a unified parameter $\gamma$ defined as $T_x/(T_{\mathrm{g}}+T_{\mathrm{l}})$. This approach was confirmed and validated by experimental data in various glass-forming systems including oxide glasses, cryoprotectants, and metallic glasses.