Crystallization kinetics of rapidly quenched Cu50Zr50 and Cu46Zr46Al8 glass-forming alloys

7th International Conference Radiation-thermal Effects and Processes in Inorganic Materials

材料科学;物理学

Kulikova, T.V.^1 ; Ryltseva, A.A.^1 ; Bykov, V.A.^1,2 ; Estemirova, S Kh.^1,2 ; Shuhyaev, K Yu.^1,2

Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia^1

Ural Federal University Named after First President of Russia B.N. Yeltsin, Ekaterinburg, Russia^2

关键词: Consecutive reaction;    Crystallization process;    Crystallization stage;    Glass-forming alloys;    Multivariate non-linear regression;    Structure and thermal properties;    Two step kinetic models;    Wide temperature ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/168/1/012036/pdf
DOI  :  10.1088/1757-899X/168/1/012036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We studied the crystallization processes, the structure and thermal properties of amorphous alloys Cu50Zr50and Cu46Zr46Al8in a wide temperature range. Comparative study of the crystallization kinetics of these amorphous alloys was carried out for the first time using multivariate non-linear regression. It was found that mechanisms of the crystallization of studied metallic glasses are substantially different. The binary alloy is crystallized by branched reaction complex in four steps. For the ternary system was proposed two-step kinetic model of the crystallization process with consecutive reactions. The values of the total energy of activation for each crystallization stage reach to Cu50Zr50: E1(345.2 kJ/mol); E2(307.9 kJ/mol), E3(281.1 kJ/mol), E4(259.51 kJ/mol) and Cu46Zr46Al8: E1(350.7 kJ/mol); E2(150.4 kJ/mol).