Intermetallics ( IF 4.3 ) Pub Date : 2021-04-07 , DOI: 10.1016/j.intermet.2021.107201 Xiaocheng Li , Shengzhong Kou , Chunyan Li , Yanchun Zhao , Yutian Ding
A quadrilateral with pseudo-four characteristic temperatures as vertices is established based on four aspects (1. The onset crystallization temperature Tx: resistance to crystallization; 2. The liquid temperature Tl: liquid stability; 3. The supercooled liquid region of glass (SLRglass) ΔTx = Tx-Tg, where Tg is the glass transition temperature: stability of SLRglass; 4. The supercooled liquid region of melt (SLRmelt) ΔTg = Tl-Tg: glass-forming ability/tendency of glass itself) from two perspectives of the glass-forming ability (GFA) in cooling process and glass stability (GS) in heating process. According to pseudo-four characteristic temperatures, a glass-forming ability and stability criterion (G-FAS criterion) is derived and modified: G-FAS = Tx/Tl+(Tx-Tg)/(Tl-Tg) and G-FASm = Tx/Tl+(Tx-Tg)/(1.5Tx-Tg). The validity and feasibility of the newly proposed criterion are elaborated and discussed through evaluating the correlation between criterion and Rc and the consistency with the boundary conditions. Comparison with other currently existing 23 characteristic temperature-based criteria shows that the presently proposed criterion has excellent performance both correlation with Rc and consistency with boundary conditions.
中文翻译:
由伪四个特征温度得出的玻璃形成能力和稳定性的判据
基于四个方面,建立了以伪四个特征温度为顶点的四边形(1.起始结晶温度T x:抗结晶性; 2。液体温度T l:液体稳定性; 3。玻璃的过冷液体区域( SLR玻璃)ΔT X = T X -T克,其中T克是玻璃化转变温度:SLR的稳定性玻璃; 4.熔体(SLR的过冷液体区域的熔体)ΔT克 = T升-T克:从冷却过程中的玻璃形成能力(GFA)和加热过程中的玻璃稳定性(GS)的两个角度来看:玻璃的玻璃形成能力/玻璃本身的倾向。根据伪四个特征温度,导出并修改了玻璃形成能力和稳定性标准(G-FAS准则):G-FAS = T x / T l +(T x -T g)/(T l -T g)和G-FAS m = T x / T l +(T x -T g)/(1.5T x -T g)。通过评估准则与R c之间的相关性以及与边界条件的一致性,阐述和讨论了新提出准则的有效性和可行性。与其他当前存在的23个基于温度的特征标准进行比较表明,目前提出的标准在与R c的相关性和与边界条件的一致性方面均具有出色的性能。