基于T_(g)复特征温度参数的玻璃形成能力及稳定性判定准则  

Glass-Forming Ability and Stability Criterion Based on Complex Characteristic Temperature Parameters Derived from T_(g)

作　　者：李晓诚 寇生中[1,2] 付小强 李春玲[3] Li Xiaocheng;Kou Shengzhong;Fu Xiaoqiang;Li Chunling(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [3]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2022年第6期2084-2089,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51971103,51861021);甘肃省重点研发计划(20YF8GA052)。

摘　　要：从降温过程的玻璃形成能力(GFA)和升温过程的玻璃稳定性(GS)出发,构建出基于玻璃转变温度T_(g)衍生的复特征温度参数三角形,从而推导出判定GFA&GS的准则并从二温度参数和三温度参数对准则均衡贡献的角度,进一步对准则进行了修订:G_(T_(g))=T_(g)/T_(1)+T_(x)/T_(g)+(T_(x)-T_(g))/(T_(1)-T_(g))和G_(T_(gm))=T_(g)/T_(1)+(Tx/T_(g))/2+[(T_(x)-T_(g))/(T_(1)-T_(g))]^(0.3)。通过大量金属玻璃、氧化物玻璃和有机化合物玻璃形成物从GFA和GS两方面验证了准则的可靠性,并与当前基于特征温度的判定准则进行了对比分析。结果表明,新提出的准则在评判GFA&GS具有广泛应用性,尤其是修订后的准则在金属玻璃的GFA和GS判定方面表现最优,可以作为一个可靠的准则。A triangle of complex characteristic temperature parameters derived from glass transition temperature T_(g) was constructed from two perspectives of the glass-forming ability(GFA)in cooling process and glass stability(GS)in heating process.According to two complex characteristic temperature parameters,a GFA&GS criterion was derived and modified from the perspective of balanced contribution of two temperature parameters T_(g)/T_(1) and T_(x)/T_(g),and the three temperature parameter(T_(x)-T_(g))/(T_(1)-T_(g))to the evaluation criterion:G_(T_(g))=T_(g)/T_(1)+T_(x)/T_(g)+(T_(x)-T_(g))/(T_(1)-T_(g))和G(T_(gm))=T_(g)/T_(1)+(T_(x)/T_(g))/2+[(T_(x)-T_(g))/(T1-T_(g))]^(0.3).Through a large number of metallic glasses,oxide glasses and cryoprotectants,the reliability and efficiency of the criteria were verified and elaborated from GFA and GS in comparison with the current criteria based on characteristic temperatures.The results show that the new criteria have wide application in the evaluation of GFA&GS,especially the modified criterion has the best performance in the evaluation of GFA&GS of metallic glasses,and can be used as a reliable criterion.

关 键 词：金属玻璃 非晶形成能力 热稳定性 特征温度 

分 类 号：TG139.8[一般工业技术—材料科学与工程]