热脉冲对铜晶态非晶态转变的影响  

Influence of thermal pulse on crystalline-to-amorphous transformation of pure Cu

作　　者：范韶蓉[1] 倪晓东[1] 张远政[1] 

机构地区：[1]北京科技大学应用科学学院,北京100083

出　　处：《北京科技大学学报》2006年第8期759-761,共3页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50472092)

摘　　要：采用分子动力学和EAM(embeddedatommethod)势,模拟研究了热脉冲对金属铜从晶态到非晶态转变的影响.计算结果表明,热脉冲作用下,转变时体系平均温度高于平衡计算熔点,结构转变是过热熔化过程,系统不可能发生从晶态到非晶态非平衡转变.随着热脉冲频率的增大,转变所需热脉冲幅度减小,体系转变过热度降低.The molecular dynamic simulation and the embedded atom method （EAM） were used to simulate the influence of thermal pulse with different frequencies on the transformation of Cu from crystalline state to non-crystalline state. The results show that the average system temperature is higher than the calculated equilibrium melting point of Cu while the transformation occurs which should be an overheated melting process, It is impossible to transfer the crystalline state into non-crystalline state under thermal pulse. With increasing thermal pulse frequency, the minimum thermal pulse energy and system overheating degree decrease.

关 键 词：铜 晶态 热脉冲 转变温度 双体分布函数 分子动力学 EAM势 

分 类 号：TG146.11[一般工业技术—材料科学与工程]