Research Progress of Laser Bonding Process and Joint Properties of Non-metallic Materials

The research progress of the laser beam welding process and the properties of joints between glass, ceramic, polymer, bulk metallic glass (bulk metallic glass, BMG) and metal were reviewed in this paper. The effects of laser welding power, welding speed, defocusing amount and the pressure on the performance of the joint were analyzed. The influence of femtosecond and nanosecond laser on the shear strength of metal-glass joints was compared with each other. The bonding mechanism and key factors influencing the reliable bonding of glass and metal, ceramic and metal & ceramic and polymer were also explored. The cracking problems of the high boron silicon glass on the surface of were solved by adding the intermediate layer. The pre-oxidation of metal surface can promote interface bonding and improve joints performance. At the same time, the weld preheat and the postweld heat treatment were adopted to reduce stress and cracks.