Adhesion phenomena in bonded joints
Adhesion phenomena in bonded joints
复制标题
DOI：
10.1016/j.ijadhadh.2012.04.007
复制
发表时间：
2012-10-01
影响因子：
3.4
通讯作者：
Baldan, A.
中科院分区：
文献类型：
--
作者：
Baldan, A.
粘接是许多工业领域的关键连接技术，包括汽车和航空航天工业、生物医学应用和微电子。由于对连接相似或不相似的结构部件的需求越来越大，主要是在设计轻质结构的框架内，粘合剂连接获得越来越多的兴趣。当两种材料接触时，它们之间的适当或足够的粘合是非常重要的，因此有必要设计方法来获得相似或不相似材料（包括金属材料、聚合物、复合材料和陶瓷的不同组合）之间所需的粘合强度。为了使粘附成为可能，有必要在界面上产生固有的粘附力。这些力量的规模和性质非常重要。从热力学的观点来看，界面的真实粘附功（或固有性质）从结合的材料产生自由表面。已知粘附机制取决于所讨论的材料的表面特性。粘合剂和基材之间的固有粘合力源于所有材料都具有作用于其原子和分子之间的吸引力的事实，并且这些原子间和分子间力的直接量度是表面张力。对粘附力的原子/分子理解在选择或创建适当的材料以获得所需的粘附强度时应该是非常有益的。本文对以下几个方面进行了详细的综述：（a）相似和不同材料的表面或界面;（B）胶接接头中的粘接或结合机理;（c）粘接的热力学理论：表面张力或表面自由能概念，包括润湿、润湿标准、润湿性和粘附的热力学功，（d）表面自由能的分散和极性分量，最后（e）表面粗糙度对润湿性或粘附性的影响。(c)2012爱思唯尔有限公司保留所有权利。
Adhesive bonding is a key joining technology in many industrial sectors including the automotive and aerospace industries, biomedical applications, and microelectronics. Adhesive bonding is gaining more and more interest due to the increasing demand for joining similar or dissimilar structural components, mostly within the framework of designing lightweight structures. When two materials are brought in contact, the proper or adequate adhesion between them is of great importance, so it is necessary to device ways to attain the requisite adhesion strength between similar or dissimilar materials including the different combinations of metallic materials, polymers, composite materials and ceramics. To make adhesion possible, it is necessary to generate intrinsic adhesion forces across the interface. The magnitude and the nature of those forces are very important. From a thermodynamic standpoint the true work of adhesion (or intrinsic property) of the interface create free surfaces from the bonded materials. Adhesion mechanisms have been known to be dependant on the surface characteristics of the materials in question. The intrinsic adhesion between the adhesive and substrates arises from the fact that all materials have forces of attraction acting between their atoms and molecules, and a direct measure of these interatomic and intermolecular forces is surface tension. Atomic/molecular understanding of adhesion should be extremely beneficial in selecting or creating the appropriate materials to attain the desired adhesion strength. In the present paper, the following topics are reviewed in detail: (a) the surfaces or interfaces of similar and dissimilar materials, (b) adhesion or bonding mechanisms in the adhesive joints (c) thermodynamic theory of adhesion: surface tension or surface free energy concepts including the wetting, wetting criteria, wettability, and thermodynamic work of adhesion, (d) dispersion and polar components of surface free energies, and finally (e) effect of surface roughness on wettability or adhesion. (c) 2012 Elsevier Ltd. All rights reserved.