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采用Ag-21Cu-4.5Ti钎料对表面沉积了CaCO3颗粒的石英纤维复合材料(QFSC)与因瓦合金(Invar)进行了钎焊试验,结果表明,在1173K保温10min条件下可获得致密的接头.在钎焊过程中,CaCO3颗粒的分解产物CaO与QFSC发生界面反应生成3CaO·2SiO2固溶体,钎料与QFSC,Invar合金均发生界面反应,形成如下界面组织结构:QFSC/3CaO·2SiO2+Ti3O5+Fe2Ti+NiTi+Ag(s,s)+Cu(s,s)/Invar.接头力学性能测试结果表明,颗粒填充QFSC/Invar接头与未表面处理QFSC/Invar接头相比在抗剪性能上提高了约5倍,达到11.6MPa.
The brazing test of quartz fiber composites (QFSC) and Invar with Ag-21Cu-4.5Ti brazing filler metal on the surface was carried out. The results show that the compact joints can be obtained at 1173K for 10min In the process of brazing, CaCO3 particles interfacially react with QFSC to form 3CaO · 2SiO2 solid solution, and the interfacial reaction occurs between the solder and QFSC and Invar alloy to form the following interfacial microstructure: QFSC / 3CaO · 2SiO2 + Ti3O5 + Fe2Ti + NiTi + Ag (s, s) + Cu (s, s) / Invar. The mechanical properties of the joints showed that the particle-filled QFSC / Invar joints improved the shear resistance compared with the unfinished QFSC / Invar joints About 5 times, reaching 11.6MPa.