Ceramic-metal composites with novel performance are desirable materials; however, differences in their properties result in difficulties in joining. In this study, the joining of metal to ceramic is investigated. We recently succeeded in causing super-spread wetting on the surface fine crevice structures of metal surfaces produced by both laser irradiation and reduction-sintering of oxide powders. In this work, joining copper onto an Al₂O₃ plate was achieved by taking advantage of super-spread wetting. Fe₂O₃ powder was first sintered under reducing conditions to produce a microstructure which can cause super-spread wetting of liquid metal on an Al₂O₃ plate. A powder-based surface fine crevice structure of metallic iron with high porosity was well-formed due to the bonding of the reduced metallic iron particles. This structure was joined on an Al₂O₃ plate with no cracking by the formation of an FeAl₂O₄ layer buffering the mismatch gap between the thermal expansion coefficients of iron and Al₂O₃. We successfully achieved metalizing of the Al₂O₃ surface with copper without interfacial cracks using super-spread wetting of liquid copper through the sintered metallic iron layer on the Al₂O₃ plate. Then, laser irradiation was conducted on the surface of the copper-metalized Al₂O₃ plate. A laser-irradiated surface fine crevice structure was successfully created on the copper-metalized Al₂O₃ plate. Moreover, it was confirmed that the super-spread wetting of liquid tin occurred on the laser-irradiated surface fine crevice structure, finally accomplishing the joining of a copper block and the copper-metalized Al₂O₃.

中文翻译：

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使用超扩展润湿将金属连接到陶瓷板

具有新颖性能的陶瓷金属复合材料是理想的材料。但是，它们的性质不同会导致连接困难。在这项研究中，研究了金属与陶瓷的连接。最近，我们成功地在由激光照射和氧化物粉末的还原烧结所产生的金属表面的细小裂纹结构上引起了超扩散润湿。在这项工作中，通过利用超扩展润湿将铜连接到Al ₂ O ₃板上。首先在还原条件下烧结Fe ₂ O ₃粉末，以产生可导致液态金属在Al ₂ O ₃上超扩散润湿的微观结构。盘子。由于还原的金属铁颗粒的结合，形成了具有高孔隙率的金属铁的基于粉末的表面细缝结构。通过形成FeAl ₂ O ₄层，该结构缓冲了铁和Al ₂ O ₃的热膨胀系数之间的不匹配间隙，从而将该结构连接到没有开裂的Al ₂ O ₃板上。通过使用液态铜通过Al ₂ O ₃上的烧结金属铁层进行超扩散湿润，我们成功地实现了铜的Al ₂ O ₃表面金属化而没有界面裂纹盘子。然后，在铜金属化的Al ₂ O ₃板的表面上进行激光照射。在铜金属化的Al ₂ O ₃板上成功创建了激光照射的表面细缝结构。此外，已证实在激光照射的表面细缝隙结构上发生了液态锡的超扩散润湿，最终实现了铜块与铜金属化的Al ₂ O _3的结合。