湖南大学学报（自然科学版）2025，Vol.52Issue(6)：88-96,9.DOI:10.16339/j.cnki.hdxbzkb.2025179
飞秒激光焊接Al2O3陶瓷的裂纹特征与接头性能研究
Research on Crack Characteristics and Joint Properties of Femtosecond Laser Welding Al2O3 Ceramics
摘要
Abstract
Alumina ceramics are widely used in the field of electronic packaging because of their excellent dielectric properties and stable physical and chemical properties.However,the large crack tendency of its weld reduces the joint performance and greatly limits the application of ceramic joints.In this paper,a femtosecond laser is used to weld alumina ceramics.The effects of laser beam scanning trajectory,laser power,and scanning speed on weld crack characteristics and joint properties are studied.A classification method of weld grade based on average crack width is proposed.The results show that compared with ellipse,helix,vertical 8 characters,and horizontal 8 characters,sinusoidal scanning laser welding alumina ceramics can obtain smaller average crack width and higher shear force.Increasing the laser power and decreasing the scanning speed is beneficial to reduce the average crack width,increase the weld penetration,and then increase the shear force of the joint.The maximum shear force reaches 1980 N,which is about 61%of the base material shear force.A prediction model of joint shear force based on the average crack width and penetration depth of the weld is established,and the model's accuracy is proved by verification experiments.The minimum deviation between the predicted value and the measured value is only 0.45%.The research results provide technical guidance and theoretical support for high-performance welding of ceramics.关键词
陶瓷材料/激光束焊接/裂纹扩展/剪切应力/焊缝熔深Key words
ceramics materials/laser beam welding/crack propagation/shear stress/weld penetration分类
矿业与冶金引用本文复制引用
陈聪,吴宇凡..飞秒激光焊接Al2O3陶瓷的裂纹特征与接头性能研究[J].湖南大学学报（自然科学版）,2025,52(6):88-96,9.基金项目
整车先进设计制造技术全国重点实验室自主研究课题(72275008),Independent Research Project of State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle(72275008) （72275008）
湖南省自然科学基金面上项目(2024JJ5080),Natural Science Foundation of Hunan Province(2024JJ5080) （2024JJ5080）
