A Modified Glass Formation Criterion for Various Glass Forming Liquids with Higher Reliability  

作　　者：X. H. Du J. C. Huang 

机构地区：[1]Institute of Materials Science and Engineering, National Sun Yat-Sen University, Kaohsiung 804 [2]Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang, 110034

出　　处：《Chinese Physics Letters》2007年第5期1335-1338,共4页中国物理快报（英文版）

摘　　要：A modified indicator of the glass forming ability （GFA） from the previous 7 = Tx/（Tl ＋ Tg） for various glass forming liquids is proposed based on a conceptual approach which combines more acceptable physical metallurgy views in terms of the time-temperature-transformation diagrams. It is found that the glass forming ability for glass forming liquids is closely associated mainly with two factors, i.e. （2Tx - Tg） and Tl （wherein Tx is the onset crystallization temperature, Tg the glass transition temperature, and Tl the liquidus temperature）, and could be predicated by a unified parameter γm defined as （2Tx - Tg）/Tl. This approach is confirmed and validated by experimental data in various glass forming systems including oxide glasses, cryoprotectants and metallic glasses, which all shows a higher reliability when their glass forming ability is predicted by the modified parameter.A modified indicator of the glass forming ability （GFA） from the previous 7 = Tx/（Tl ＋ Tg） for various glass forming liquids is proposed based on a conceptual approach which combines more acceptable physical metallurgy views in terms of the time-temperature-transformation diagrams. It is found that the glass forming ability for glass forming liquids is closely associated mainly with two factors, i.e. （2Tx - Tg） and Tl （wherein Tx is the onset crystallization temperature, Tg the glass transition temperature, and Tl the liquidus temperature）, and could be predicated by a unified parameter γm defined as （2Tx - Tg）/Tl. This approach is confirmed and validated by experimental data in various glass forming systems including oxide glasses, cryoprotectants and metallic glasses, which all shows a higher reliability when their glass forming ability is predicted by the modified parameter.

关 键 词：BULK METALLIC GLASSES ABILITY ALLOYS STABILITY SYSTEMS PARAMETERS FRAGILITY 

分 类 号：TQ171[化学工程—玻璃工业]