Kinetics of Glass Transition and Crystallization in Carbon Nanotube Reinforced Mg-Cu-Gd Bulk Metallic Glass
来源期刊：JOURNAL OF RARE EARTHS2006年第3期
论文作者：Sun Yufeng Wei Bingchen Wang Yinchun Wang Yuren Li Weihuo
Key words：metallic glass; carbon nanotube; glass transition; crystallization; kinetic effect; composite glass; Gadolinium; rare earths;
Abstract: Mg65Cu25Gd10 bulk metallic glass and its carbon nanotube reinforced composite were prepared. Differential scanning calorimeter (DSC) was used to investigate the kinetics of glass transition and crystallization processes. The influence of CNTs addition to the glass matrix on the glass transition and crystallization kinetics was studied. It is shown that the kinetic effect on glass transition and crystallization are preserved for both the monothetic glass and its glass composite.Adding CNTs in to the glass matrix reduces the influence of the heating rate on the crystallization process. In addition, the CNTs increase the energetic barrier for the glass transition. This results in the decrease of GFA. The mechanism of the GFA decrease was also discussed.
Sun Yufeng1，Wei Bingchen2，Wang Yinchun2，Wang Yuren2，Li Weihuo2
(1.Research Center for Materials, Department of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China;
2.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China)
Abstract:Mg65Cu25Gd10 bulk metallic glass and its carbon nanotube reinforced composite were prepared. Differential scanning calorimeter (DSC) was used to investigate the kinetics of glass transition and crystallization processes. The influence of CNTs addition to the glass matrix on the glass transition and crystallization kinetics was studied. It is shown that the kinetic effect on glass transition and crystallization are preserved for both the monothetic glass and its glass composite.Adding CNTs in to the glass matrix reduces the influence of the heating rate on the crystallization process. In addition, the CNTs increase the energetic barrier for the glass transition. This results in the decrease of GFA. The mechanism of the GFA decrease was also discussed.
Key words:metallic glass; carbon nanotube; glass transition; crystallization; kinetic effect; composite glass; Gadolinium; rare earths;
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