Brazing of micrograin-filled quartz fiber reinforced silica composites and Invar using Ag-21Cu-4.5Ti alloy

作者: Lei Zhao , JiCai Feng , XiaoYu Tian , LiXia Zhang , Peng He

DOI: 10.1007/S11434-011-4569-X

关键词: Materials scienceComposite materialWettingAlloyMetallurgyShear strengthMetalMicrostructureInvarBrazingNickel titaniumMultidisciplinary

摘要: Brazing of quartz fiber reinforced silica composites (QFSC) to Invar alloy was carried out in a vacuum at 1173 K for 10 min using Ag-21Cu-4.5Ti metal filler. Experiments indicated that prefilled with CaCO3 micrograins had good wettability. The decomposed CaO during brazing. After brazing, joint structure QFSC/3CaO·2SiO2+Ti3O5+Fe2Ti+NiTi+Ag(s,s)+ Cu(s,s)/Invar established. shear strength the brazed reached 11.6 MPa room temperature, which is about five times obtained without surface filling.

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