Direct welding of diffuse alumina ceramics by ultrashort pulse laser

The time consumption of ceramic joining methods has hindered the widespread application of ceramic components in the industry. The recently proposed ceramic joining approach via ultrashort pulse laser welding could be a feasible solution to this problem. Herein, we optimised the welding parameters and conducted a comprehensively characterisation of the joint microstructures and fracture morphology. The achieved four-point bending strength reached approximately 60% of that of the base material. The welding mechanism was hypothesised from the perspective of nonlinear absorption of the ultrashort pulse laser by the alumina ceramic. These results are expected to provide an in-depth understanding of the emerging technology.

Automated summary

The time consumption of ceramic joining methods has hindered the widespread application of ceramic components in the industry. The recently proposed ceramic joining approach via ultrashort pulse laser welding could be a feasible solution to this problem. Through optimizing welding parameters and comprehensively characterizing joint microstructures and fracture morphology, the achieved four-point bending strength reached approximately 60% of that of the base material. The welding mechanism was hypothesized from the perspective of nonlinear absorption of the ultrashort pulse laser by the alumina ceramic. These results are expected to provide an in-depth understanding of the emerging technology.