摘要
采用钛板表面渗铝工艺成功地实现了Ti／Al的扩散连接，通过扫描电镜（SEM）、显微硬度、X射线衍射等，对Ti／Al扩散焊接头区的组织结构进行了分析．试验结果表明：Ti／Al扩散焊接头区由钛侧界面、扩散过渡区、铝侧界面组成；在Ti/Al扩散焊界面附近的过渡区中可能形成Ti3Al、TiAl和TiAl，金属间化合物．控制工艺参数能够减小生成的金属间化合物层的厚度．距扩散焊界面较远铝基体一侧的显微硬度为30-40HM，钛基体和过渡区界面附近没有明显的脆性相.
Ti/Al dissimilar materials were successfully bonded together by means of vacuum diffusion bonding after aluminizing on the surface of Ti sheet. The microstructure and phase constituent for the Ti/Al diffusion bonded joint were analyzed by means of scanning electron microscopy （SEM） , microsclerometer and X - ray diffractometry （XRD）. The test results indicated that Ti/Al diffusion joint included Ti side interface, diffusion transition zone and Al side interface. Intermetallics Ti3Al, TiM and TiAl3 were formed in the transition zone near Ti/Al interface. Controlling technology parameters of diffusion bonding could reduce the thickness of intermetallics layer. The microhardness of the Al substrate away from the diffusion interface was 30 -40HM. There was no obvious brittle phase near the Ti/Al interface of Ti substrate and transition zone.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2007年第2期206-210,共5页
Materials Science and Technology
基金
国家自然科学基金资助项目(50375088)
山东省中青年优秀科学家奖励基金资助项目(2006BS04004)
关键词
扩散焊接
显微组织
界面
金属间化合物
diffusion bonding
microstructure
interface
intermetallic
