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系统研究了Cu-Ni-Ti系合金钎料对Si3 N4陶瓷的润湿性 ,并使用不同形式的钎料进行了Si3 N4/Si3 N4的连接 .使用真空熔炼合金作为钎料 ,获得的Si3 N4/Si3 N4接头强度值并不理想 ,分析其原因 ,采用膏状钎料改善钎料成分的均匀性 ,并重新设计了四种成分的钎料 ,其中钎料Cu -Ni5～ 2 5 -Ti1 6～ 2 8-Br(B) / %对应的Si3 N4/Si3 N4接头强度最高 ,在 1 3 5 3K ,1 0min的真空钎焊条件下三点弯曲强度达 3 3 8.8MPa.制备了上述合金的急冷态钎料 ,使连接强度进一步提高至 40 2MPa,接头呈现较稳定的高温性能 .使用这种急冷态钎料还获得了室温及高温强度均较理想的Si3 N4/ 1 .2 5Cr-0 .5Mo钢接头 .
The wettability of Cu-Ni-Ti alloy solder to Si3N4 ceramics was studied systematically and the connection of Si3N4 / Si3N4 was carried out with different forms of solder.Using vacuum melting alloy as filler, Si3N4 / Si3 N4 joint strength value is not ideal, analyze the reason, the use of cream solder to improve the uniformity of the solder composition, and redesigned the solder of four components, including solder Cu -Ni5 ~ 2 5 -Ti1 6 The strength of Si3N4 / Si3N4 joints corresponding to ~ 2 8-Br (B) /% is the highest, and the three-point bending strength under vacuum brazing conditions of 1 3 5 3K and 1 0min reaches 33.8 MPa. The quenching brazing filler metal further improves the bonding strength to 40 2MPa, and the joint exhibits a stable high-temperature performance. The Si3N4 / 1 .2Cr-0 alloy with better room-temperature and high-temperature strength has also been obtained by using such a quenched brazing filler metal. 5Mo steel connector.