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通过一种胶接辅助钎焊连接方法,采用自制活性胶做表面改性剂,Ag-Cu共晶箔和纯Cu箔做中间层,对石英纤维增强氧化硅复合材料和因瓦合金进行了钎焊连接.通过扫描电子显微镜、能谱仪及X射线衍射仪对接头的微观组织、界面成分及接头的物相组成进行了分析研究.结果表明,胶接辅助钎焊连接方法可以有效实现石英纤维增强氧化硅复合材料与因瓦合金的致密连接,接头界面处形成多种生成相,包括TiO,Si,TiC,Fe2Ti,Cu(s,s)和Ag(s,s).当钎焊温度为850℃,保温时间为15min时,接头界面结构可表示为:QFSC/TiO+Si+Cu(s,s)+Ag(s,s)+TiC/Cu(s,s)+Ag(s,s)+Fe2Ti/Invar,接头抗剪强度可达44MPa.当钎焊温度升高或降低时,接头的抗剪强度均呈现降低趋势.
Through a kind of bonding auxiliary brazing connection method, the self-made active glue is used as the surface modifier, the Ag-Cu eutectic foil and the pure Cu foil as the middle layer, the quartz fiber reinforced silicon oxide composite material and the Invar alloy are brazed The microstructure, interfacial composition and the phase composition of the joints were analyzed by SEM, EDS and XRD.The results show that the method of bonding auxiliary brazing can effectively realize the quartz fiber (Ti, Fe, Ti), Cu (s, s) and Ag (s, s) were formed at the interface of the composites by increasing the density of the silicon oxide composites and the invar.When the soldering temperature was The interface structure can be expressed as QFSC / TiO + Si + Cu (s, s) + Ag (s, s) + TiC / Cu (s, s) + Ag ) + Fe2Ti / Invar, the shear strength of joints can reach 44MPa. When the brazing temperature increases or decreases, the shear strength of joints decreases.