飞秒激光脉冲焊接透明微晶玻璃的实验研究  

Experimental Study on Transparent Glass-Ceramic Welding with Femtosecond Laser Pulses

作　　者：陈观华 肖蒲庐 张翔 陈宇[4] 袁孝 Chen Guanhua;Xiao Pulu;Zhang Xiang;Chen Yu;Yuan Xiao(School of Optoelectronic Science and Engineering,Soochow University,Suzhou 215006,Jiangsu,China;Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province,Suzhou 215006,Jiangsu,China;Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,Jiangsu,China;Amplitude(Shanghai)Laser Technology Co.,Ltd.,Suzhou 215123,Jiangsu,China)

机构地区：[1]苏州大学光电科学与工程学院,江苏苏州215006 [2]江苏省先进光学制造技术重点实验室,江苏苏州215006 [3]江苏省苏州大学现代光学技术教育部重点实验室,江苏苏州215006 [4]奥徒(上海)激光技术有限公司,江苏苏州215123

出　　处：《中国激光》2023年第16期30-37,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(U1930106);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：利用飞秒激光脉冲开展了零热膨胀系数Li2O-Al_(2)O_(3)-SiO_(2)(LAS)透明微晶玻璃的非光学接触式焊接研究,分析了不同能量飞秒激光焊接LAS透明微晶玻璃的焊缝形貌和剪切强度,并对焊接后LAS透明微晶玻璃的透过率进行了测量。在激光脉冲宽度为300 fs、波长为1030 nm、单脉冲能量为3.0μJ时,焊接后LAS透明微晶玻璃的剪切强度高达23.51 MPa,光学透过率相对于原始LAS透明微晶玻璃下降了5%。随着单脉冲能量的增加,LAS透明微晶玻璃的光学透过率发生不同程度的下降,改性区域逐渐远离焦点,向激光源方向移动,使得分界面处的焊缝宽度先增大至10.7μm而后逐渐减小。X射线衍射分析结果表明,在该激光参数下实现了LAS透明微晶玻璃焊接而未产生新的晶相。Objective Transparent glass-ceramics have attracted widespread attention as a composite material with excellent performance,and potential applications require the welding of the heat-tempered glass.Femtosecond laser,as a promising tool for processing in recent years,has been widely used in the field of processing due to its characteristics of high peak power,small heat-affected zone caused in the material,high processing accuracy,and wide range of applicable materials.However,a great deal of research work has been done based on the welding of untempered glass,and the welding of tempered glass is rarely reported.There are two ways to temper glasses,one is chemical tempering,and the other is thermal tempering.The thermally tempered glass can buffer part of the external stress and inhibit the melt from filling glass gap,thus increasing the difficulty of glass welding.To our knowledge,the non-optical contact welding of Li2O-Al2O3-SiO2(LAS)transparent glass-ceramics with zero thermal expansion coefficient has been studied by femtosecond laser pulses for the first time.This study has potential significance for the further expansion of the applications of LAS transparent glass-ceramics.Methods A femtosecond laser beam with a wavelength of 1030 nm is used for experimental studies of glass welding to reduce the cracking tendency during the glass welding process.A lens with a focal length of 100 mm is used to focus the femtosecond laser beam,and the temperature gradient of the focused spot is smoother,which reduces the residual stresses induced during welding process.In order to achieve a strong heat accumulation effect of the femtosecond laser pulse inside the LAS transparent glass-ceramics,the repetition rate is kept at 500 kHz.And the spots between scanning lines are guaranteed to have certain overlap.The morphology and the shear strength of the welding region of LAS transparent glass-ceramics welded by femtosecond laser with different energies are studied,and the transmittance of the welded glass is measured.The energy

关 键 词：激光技术 飞秒激光 透明微晶玻璃 玻璃焊接 单脉冲能量 非光学接触 

分 类 号：TG44[金属学及工艺—焊接]