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 Si₃N₄ ceramic, and the traditional AgCu eutectic filler alloy can wet on the metalized surface completely. The metalized porous Si₃N₄ ceramic 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.

中文翻译：

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激光诱导的多孔Si3N4陶瓷金属化及其钎焊成TiAl合金

传统钎料在陶瓷表面的润湿性差，总是会导致接头处形成缺陷并最终削弱粘结强度，特别是多孔陶瓷。陶瓷上的金属化是提高润湿性的有效方法。在这项工作中，采用激光诱导的熔覆工艺对多孔Si ₃ N ₄陶瓷的表面进行金属化处理，而传统的AgCu共晶填充合金可以在金属化表面上完全润湿。用AgCu填充合金成功地将金属化的多孔Si ₃ N ₄陶瓷钎焊到TiAl合金上。多孔Si ₃ N ₄的界面微观结构和力学性能/ TiAl合金钎焊接头通过新型激光诱导的金属化工艺得到了显着改善。