摘要
胶接具有独特的性能而被广泛关注,但在实际应用中往往由于界面结合强度不足而导致接头在服役过程中过早失效。激光表面处理是一种能够有效提高胶接接头表面性能的方法,通过激光表面处理会使黏接材料表面形成不同的表面微纳结构,从而改善接头的性能。首先介绍了激光表面处理原理及激光器分类,对比了不同激光器的优缺点及加工质量特性,分析了激光加工参数对接头强度的影响。其次从激光加工不同表面微纳结构入手,阐述了不同表面微纳结构的加工方式,分析了不同表面微纳结构对不同材料接头强度的影响。此外,针对不同的表面微纳结构,其结构参数有所不同,导致接头表面化学成分和润湿性能也有所不同,使得接头强度有所差异,在此基础上分析了微纳结构参数对接头强度的影响及原因。同时,胶层间的作用机制与接头强度具有密不可分的联系,研究表明,不同的表面微纳结构对胶层的作用机制具有明显的不同,归纳总结发现,经激光表面处理形成表面微纳结构后接头表面粗糙度、化学性质、润湿性能及胶层间裂纹的扩展对接头强度的提升具有一定作用。最后,对激光表面处理微纳结构的研究进行了展望。
Adhesive bonding has been widely concerned with its unique properties,but in practical applications,it often leads to premature failure of the joint in service due to insufficient interfacial bonding strength.Laser surface treatment is a method to effectively improve the surface performance of the adhesive joint,which will make the surface of the bonding material form a different surface micro nano structure,thus improving the performance of the joint.Firstly,the principle of laser surface treatment and the classification of lasers are introduced,which are mainly divided into short-pulse lasers(nanosecond lasers)and ultrashort-pulse lasers(picosecond lasers and femtosecond lasers),and the advantages and disadvantages of different lasers and the processing quality characteristics are compared.The nanosecond laser is the most widely used in the field of adhesive bonding due to its low cost and excellent stability,the picosecond laser is suitable for the processing of surface micrometer structure due to its characteristics,and the femtosecond laser is suitable for the processing of surface delicate structure.Meanwhile,the effect of parameters such as the laser power,spot overlap rate,pulse energy and wavelength on the strength of the joint is analyzed.Secondly,starting from laser processing of different surface micro structures,a variety of micro and nano structures such as surface pits,grooves,grids,rings,and their processing methods are expounded.The effects of laser processing parameters on the morphology of micro and nano structures and the effects of different surface micro and nano structures on the joint strengths of different materials are analyzed and the enhancement effect and applicable scenarios in comparison with the characteristics of micro and nano structures are investigated.In addition,for different surface micro and nano structures,their structural parameters such as width,depth,diameter,density,etc.are different,resulting in different chemical composition and wettability properties of the joint su
作者
徐喻琼
郑黔松
杨奇彪
钟紫珊
XU Yuqiong;ZHENG Qiansong;YANG Qibiao;ZHONG Zishan(School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China;Hubei Key Laboratory of Modern Manufacturing Quality Engineering,Wuhan 430068,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2024年第8期11-24,共14页
Surface Technology
基金
国家自然科学基金(11204158)
湖北工业大学博士科研启动基金(XJ2021006201)
现代制造质量工程湖北省重点实验室2022年度实验室开放基金(KFJJ-2022008)。
关键词
激光表面处理
胶接
微纳结构
接头强度
表面性能
作用机理
laser surface treatment
adhesive bonding
micro and nano structures
joint strength
surface property
mechanism of action
