摘要
利用团簇线判据研究了Cu基Cu-Hf-Al(Ti)三元体系块体非晶合金的形成规律。在Cu-Hf-Al和Cu-Hf-Ti体系中,分别以二十面体Cu8Hf5和附半八面体的阿基米德反棱柱Cu6Hf5两个二元团簇成分为起点,向第三组元Al和Ti连线,得到4条团簇线Cu8Hf5-Al、Cu6Hf5-Al、Cu8Hf5-Ti和Cu6Hf5-Ti。在团簇线上设计合金成分并采用铜模吸铸的方法制备直径为3mm的合金棒。XRD和热分析实验结果表明,在这4条团簇线上块体非晶合金的形成区域分别为Cu8Hf5-Al(2～6at%)、Cu6Hf5-Al(2～8.3at%)、Cu8Hf5-Ti(9～15at%)、Cu8Hf5-Ti(5～11at%),其中每条线上具有最大玻璃形成能力的合金成分分别为Cu8Hf5Al0.83(Cu57.7Hf36.3Al6)、Cu6Hf5Al1.0(Cu50Hf41.7Al8.3)、Cu8Hf5Ti1.0(Cu57.2Hf35.7Ti7.1)、Cu6Hf5Ti0.83(Cu50.7Hf42.3Ti7),都近似满足(团簇)1(胶粘原子)1非晶结构模型。
This paper investigates the bulk metallic glass formation in Cu-based Cu-Hf-Al （Ti） ternary systems by cluster line approach. Four cluster lines Cu8Hf5-Al, Cu6Hf5-Al, Cu8Hf5-Ti and Cu6Hf5-Ti are constructed by linking Cu-Hf binary clusters Cu8Hf5 and Cu6Hf5 to the third elements Al and Ti, respectively. The cluster line alloy rods with a diameter of 3 mm are prepared by copper mould suction-casting method. The XRD and thermal analysis results indicate that the bulk metallic glass-forming ranges on these cluster lines are 2～6 at%Al for Cu8Hf5-Al, 2～8.3 at% for Cu6Hf5-Al, 9～15 at% for Cu8Hf5-Ti and 5～11 at% for Cu8Hf5-Ti respectively. The best bulk metallic glasses compositions Cu8Hf5Al0.83（Cu57.7Hf36.3Al6） , Cu6Hf5Al1.0（Cu50Hf41.7Al8.3） , Cu8Hf5Ti1.0（Cu57.2Hf35.7Ti7.1） , Cu6Hf5Ti0.83（Cu50.7Hf42.3Ti7）, which have the largest glass-forming abilities on every cluster line, satisfy approximately the （cluster）1 （glue atom）1 model for metallic glasses.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A04期757-760,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50671018
50631010)
国家"973"项目(2007CB613902)
辽宁省科技基金(200610167)资助
