【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.Exp
【出 处】
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Chinese Science Bulletin
论文部分内容阅读
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 composites prefilled with CaCO3 micrograins had good wettability.The CaCO3 decomposed to CaO during brazing.After brazing,a joint of structure QFSC/3CaO·2SiO2+Ti3O5+Fe2Ti+NiTi+Ag(s,s)+ Cu(s,s)/Invar was established.The shear strength of the brazed joint reached 11.6 MPa at room temperature,which is about five times the shear strength of that obtained without surface filling.
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-21 Cu-4.5 Ti metal filler. Experiments that indicated that the composites were prefilled with CaCO3 micrograins had good wettability. The CaCO3 was decomposed to CaO during brazing. After brazing, a joint of structure QFSC / 3CaO.2SiO2 + Ti3O5 + Fe2Ti + NiTi + Ag (s, s) + Cu 11.6 MPa at room temperature, which is about five times the shear strength of that obtained without surface filling.
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