合金元素对Ti-Ni-Cu系钎料性能的影响

本实验设计一系列不同成分的Ti-Ni-Cu系钎料,研究合金元素B、Si、Zr等对钎料非晶形成能力和性能的影响.结果表明:微量B、Si元素均能显著改善Ti-Ni-Cu系钎料对Si3N4陶瓷的润湿性;在相同试验条件下,添加0.2%B的Ti40Ni15Cu钎料铺展面积最大;不含zr元素的Ti-Ni-Cu系钎料合金的非晶形成能力均很差.本实验设计的Ti40Zr20Ni20CuB0.2、Ti40Zr20Ni25CuB0.2两种钎料既具有良好的润湿性,又具有良好的非晶形成能力;与Ti40Zr25Ni15Cu非晶钎料钎焊Si3N4陶瓷的接头相比,Ti40Zr20Ni20CuB0.2、Ti40Zr20Ni25CuB0.2非晶钎料钎焊Si3N4陶瓷接头的室温强度变化不大,但高温强度有明显提高.

Influence of Alloying Elements on Properties of Ti-Ni-Cu Brazing Alloys

A series of Ti-Ni-Cu brazing alloys with different composition were designed in this experiment. The influence of the alloying elements such as B, Si and Zr on the glass forming ability and performance of the brazing alloys was studied. The results show that the wettablity of Ti-Ni-Cu brazing alloys on the Si3N4 ceramics can be significantly improved by adding traces of B or Si. Under the same experimental conditions, the Ti40Ni15Cu with 0.2% B addition has the largest wetting area. The glass forming ability of Ti-Ni-Cu brazing alloys without Zr is bad. Ti40Zr20Ni20CuB0.2 and Ti40Zr20Ni25CuB0.2 of the experiment have a good wettability as well as a good glass forming ability. The Ti40Zr20Ni20CuB0.2 and Ti40Zr20Ni25CuB0.2 amorphous brazing alloy joints of Si3N4 ceramics are similar in room-temperature strength to Ti40Zr25Ni15Cu amorphous brazing alloy joints, but the high temperature strength has been improved markedly