A new criterion for predicting glass forming ability of bulk metallic glasses and some critical discussions  

作　　者：Bang-shao DONG Shao-xiong ZHOU De-ren LI Cao-wei LU Feng GUO Xiao-jun NI Zhi-chao LU 

机构地区：[1]Advanced Technology & Materials Co., Ltd., Central Iron & Steel Research Institute, Beijing 100081, China

出　　处：《Progress in Natural Science:Materials International》2011年第2期164-172,共9页自然科学进展·国际材料（英文版）

摘　　要：A modified criterion,β’,defined as T_g/T_x-T_g/(T_l·η))(T_g,T_x,T_l andηdenote the glass transition temperature,the onset of crystallization temperature,the liquidus temperature and constant coefficient,respectively),has been proposed for assessing the glass-forming ability(GFA) of bulk metallic glasses(BMGs).A survey of the readily available experimental data associated with the thermal analysis of various BMG alloys demonstrates that the newβ’ criterion exhibits much better correlation with the GFA than other currently used criteria.But,it is more significant from statistical results to note that,all criteria including the currently proposed criterionβ’,which are all combined by T_g,T_x and T_l,almost have equal ability in measuring the glass forming ability in any glass-forming system.A modified criterion, β', defined as Tg/Tx–Tg/(Tl·η) (Tg, Tx, Tl) and η denote the glass transition temperature, the onset of crystallization temperature, the liquidus temperature and constant coefficient, respectively), has been proposed for assessing the glass-forming ability (GFA) of bulk metallic glasses (BMGs). A survey of the readily available experimental data associated with the thermal analysis of various BMG alloys demonstrates that the new β' criterion exhibits much better correlation with the GFA than other currently used criteria. But, it is more significant from statistical results to note that, all criteria including the currently proposed criterion β', which are all combined by Tg, Tx and Tl, almost have equal ability in measuring the glass forming ability in any glass-forming system.

关 键 词：AMORPHOUS materials metallic GLASSES GLASS-FORMING ability thermal analysis CRITERION 

分 类 号：TQ171.1[化学工程—玻璃工业]