CAJ | 학술논문

采用Ag-Cu-Ti钎料连接C/C复合材料,用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)等分析连接层的微观结构与相组成,并测试连接层的剪切强度.结果表明:C/C复合材料连接层的剪切强度跟连接温度与保温时间有关;在850℃、保温30 min条件下获得的连接层剪切强度最高,达到26.7 MPa;同时连接层与基体材料形成机械嵌合,界面发生元素扩散和冶金反应.钎焊连接层形成固溶体和化合物,包括Ag(s.s)、Cu(s.s)、Cu4Ti3和TiC.剪切断口形貌表明钎焊层与C/C坯体之间结合较好,具有一定的连接强度.
채용Ag-Cu-Ti천료련접C/C복합재료,용소묘전경(SEM)、능보의(EDS)、X사선연사의(XRD)등분석련접층적미관결구여상조성,병측시련접층적전절강도.결과표명:C/C복합재료련접층적전절강도근련접온도여보온시간유관;재850℃、보온30 min조건하획득적련접층전절강도최고,체도26.7 MPa;동시련접층여기체재료형성궤계감합,계면발생원소확산화야금반응.천한련접층형성고용체화화합물,포괄Ag(s.s)、Cu(s.s)、Cu4Ti3화TiC.전절단구형모표명천한층여C/C배체지간결합교호,구유일정적련접강도.
C/C composites were joined using AgCuTi brazing alloy. The microstructure, elemental diffusion and phase composition of the joint interlayer were investigated by scanning electron microscopy (SEM) ,energy dispersive spectrometer (EDS) and x-ray diffractometer (XRD), respectively. The results show that the shear strength of C/C joints is affected observably by joining temperature and holding time. The optimum process is at 850℃ for 30 min, achieving the maximum joint shear strength of 26.7MPa. Element interdiffusions and chemical reactions take place in the joining zone, resulting in formation of various solid solutions and compounds including Ag(s.s), Cu(s.s), Cu4Ti3 and TiC. The shear morphology indicates that the interface and C/C matrix are in strong joints.