Depiction of the Elastic Anisotropy of AuSn4 and AuSn2 from First-principles Calculations
As the solder joints become increasingly small and contain only a few grains, their mechanical properties cannot be determined from conventional mechanical tests as with bulk samples, and there may be a considerable variation in mechanical behavior from joint to joint because of the anisotropy of mechanical properties. In this paper, elastic constants of single-crystal AuSn4 and AuSn2 were preliminarily determined through first-principles calculations to characterize their polycrystalline elastic behavior and elastic anisotropy. The ideal bulk, shear, and Youngs moduli, as well as Poissons ratios were determined using the Voigt-Reuss-Hill method. These compounds exhibited distinct anisotropy in Youngs modulus, which may be partially responsible for the discrepancy in the experimental results.
Rong An Chunqing Wang Yanhong Tian
School of Chemical Engineering and TechnologyHarbin Institute of Technology, Harbin 150001, China De Department of Electronics Packaging Technology, School of Materials Science and EngineeringHarbin In Department of Electronics Packaging Technology, School of Materials Science and Engineering Harbin I
国际会议
北京
英文
611-616
2009-08-10（万方平台首次上网日期，不代表论文的发表时间）