Main α relaxation and slow β relaxation processes in a La30Ce30Al15Co25 metallic glass

作     者：J.C. Qiao Y.H. Chen R. Casalini J.M. Pelletier Y. Yao 

作者机构：School of Mechanics Civil Engineering and Architecture Northwestern Polytechnical University Xi'an 710072 China Chemistry Division Naval Research Laboratory Code 6120 Washington DC 20375-5342 United States Universite de Lyon MATEIS UMR CNRS5510 Bat. B. Pascal INSA-Lyon F-69621 Villeurbanne cedex France 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2019年第35卷第6期

页      面：982-986页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.51611130120,11772257 and11572249) supported by the Fundamental Research Funds for the Central Universities(No.3102017HQZZ012 and3102018ZY010) the Astronautics Supporting Technology Foundation of China the support of the Office of Naval Research for the work at NRL 

主　　题：Mechanical relaxation Dynamic mechanical relaxation α Relaxation β relaxation Physical aging 

摘      要：Dynamic relaxation processes are fundamental to understand the mechanical and physical properties of metallic glasses. In the current work, mechanical relaxations in a La30Ce30Al15Co25 bulk metallic glass were probed by dynamic mechanical analysis. In contrast to many metallic glasses, La30Ce30Al15Co25 metallic glass shows a pronounced slow β relaxation peak. Physical aging below the glass transition temperature Tgleads to an increase of the apparent activation energy and a decrease of the slow β relaxation magnitude. The correlation between the slow β relaxation and the main α relaxation is discussed.