Laser-induced metallization of porous Si3N4 ceramic and its brazing to TiAl alloy
Laser-induced metallization of porous Si3N4 ceramic and its brazing to TiAl alloy
复制标题
多孔Si3N4陶瓷的激光诱导金属化及其与TiAl合金的钎焊
DOI：
10.1111/jace.15937
复制
发表时间：
2019
影响因子：
3.9
通讯作者：
Liu Duo
中科院分区：
文献类型：
--
作者：
Zhao Yixuan;Bian Hong;Fu Wei;Hu Yu;Song Xiaoguo;Liu Duo
传统钎料在陶瓷表面润湿性差，易导致接头缺陷的形成，最终削弱连接强度，尤其是多孔陶瓷。陶瓷表面金属化是改善陶瓷润湿性的有效方法。采用激光诱导熔覆技术对多孔氮化硅陶瓷表面进行金属化处理，使传统的AgCu共晶钎料能够完全润湿金属化表面。采用AgCu钎料成功地将金属化多孔Si 3 N4陶瓷钎焊到TiAl合金上。采用激光诱导金属化新工艺显著改善了多孔Si 3 N4/TiAl合金钎焊接头的界面组织和力学性能。
The poor wettability of traditional brazing filler alloys on the surface of ceramics always lead to the formation of defects in the joints and weaken the bonding strength eventually, especially the porous ceramics. Metallization on ceramics is an effective way to improve the wettability. In this work, laser‐induced cladding process was applied to metalize the surface of porous Si3N4ceramic, and the traditional AgCu eutectic filler alloy can wet on the metalized surface completely. The metalized porous Si3N4ceramic brazed to TiAl alloy successfully using AgCu filler alloy. The interfacial microstructure and mechanical property of the porous Si3N4/TiAl alloy brazed joint was significantly improved by the novel laser‐induced metallization process.