Main α relaxation and slow β relaxation processes in a La30Ce30Al15Co25 metallic glass
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第6期
论文作者：J.C.Qiao Y.H.Chen R.Casalini J.M.Pelletier Y.Yao
文章页码：982 - 986
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.
J.C.Qiao，Y.H.Chen，R.Casalini，J.M.Pelletier，Y.Yao
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.
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