Preparation of Ti-Al alloy sheet by electron beam physical vapor deposition
Ti-Al thin sheet with dimension of 450 mm×450 mm×0.2 mm was prepared by electron beam physical vapor deposition(EB-PVD) technology.The surface and cross-section pattern of as-deposited sample were studied by SEM and AFM,and then the composition and phase were analysed by XRD and EPMA.Finally,the effect on deposit by re-evaporation of Al was explored by calculating the ratio of re-evaporating capacity with depositing capacity of Al on the substrate.The results indicate that the evaporation process with Nb addition into the molten pool makes it earlier to reach the steady-state.The existing equiaxed crystal and columnar crystal along the cross-sectional may be caused by the transformation latent heat released during the transition course of atoms from gaseous state to solid state.The effect on deposit by re-evaporation of Al can be neglected because the re-evaporating capacity of Al is far below that of the depositing capacity.
electron beam physical vapor deposition Ti-Al thin sheet microstructure saturation vapor pressure re-evaporation
MA Li HE Xiao-dong SUN Yue
Center for Composite Material,Harbin Institute of Technology,Harbin 150001,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）