碳纳米管-Mg_(65)Cu_(25)Gd_(10)非晶复合材料玻璃转变的动力学性质  

Kinetics of Glass Transition and Crystallization of Carbon Nanotube Reinforced Mg-Cu-Gd Bulk Metallic Glass

作　　者：王银春[1] 王育人[1] 魏炳忱[1] 李维火[1] 孙玉峰[2] 

机构地区：[1]中国科学院力学研究所国家微重力实验室,北京100080 [2]郑州大学材料科学与工程学院材料研究中心,河南郑州450002

出　　处：《中国稀土学报》2006年第1期37-42,共6页Journal of the Chinese Society of Rare Earths

基　　金：中科院创新基金项目(KJCX2-SW-L05);自然科学基金项目(50101012)资助

摘　　要：制备了Mg65Cu25Gd10大块非晶合金及其碳纳米管(CNTs)复合材料,对两种材料进行了不同扫描速率下的差热扫描量热分析,研究了加入CNTs对材料玻璃转变和晶化动力学效应的影响。结果表明:加入CNTs后,复合材料的玻璃转变和晶化行为仍然具有动力学效应,但加入的CNTs减小了材料晶化行为对升温速率的依赖程度;同时,加入CNTs加大了材料发生玻璃转变时需要克服的能量势垒,增大了峰值温度时的晶化反应速率常数,从而降低了材料的玻璃形成能力(GFA);对CNTs降低GFA的原因也进行了探讨。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 precess. In addition, the CNTs increases the energetic barrier for the glass transition. It results in the decrease of GFA. The mechanism of the GFA decrease was also discussed.

关 键 词：非晶 纳米管 玻璃转变 晶化 动力学 复合材料 钆 稀土 

分 类 号：TG139[一般工业技术—材料科学与工程]