Laser Surface Pre-Treatment of CFRP for Adhesive Bonding in Consideration of the Absorption Behaviour

被引：117

作者：

Fischer, F. ^{[1
]}

Kreling, S. ^{[1
]}

Jaeschke, P. ^{[2
]}

Frauenhofer, M. ^{[1
]}

Kracht, D. ^{[2
]}

Dilger, K. ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Joining & Welding, D-38106 Braunschweig, Germany

[2] Laser Zentrum Hannover eV, Hannover, Germany

来源：

JOURNAL OF ADHESION | 2012年 / 88卷 / 4-6期

关键词：

Adhesive bonding; CFRP; Laser radiation; Surface pre-treatment;

D O I：

10.1080/00218464.2012.660042

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The use of carbon fibre-reinforced plastics (CFRP) is growing significantly in all areas of lightweight construction. Thermosets like epoxy still build a major part of deployed matrix material. A suitable joining technology for CFRP is adhesive bonding. However, the bonding performance is well reduced because of contaminations. To achieve full bond-strength, adhesion of the adhesive to the components is essential. One innovative method for surface pre-treatment is laser radiation. Former investigations show that an important parameter is the absorption. As a result of that, a UV laser (wavelength of 355 nm) and a CO2 laser (wavelength of 10600 nm) were used to pre-treat specimens manufactured from 120 degrees C curing epoxy. The focus is to achieve a selective removal of resin without impairing the fibres. Lap-shear specimens have been pre-treated, bonded with an one component epoxy film adhesive and tested. The laser pre-treated specimens achieve the same bond strength as references prepared by manual abrading. Furthermore, the mechanisms of interaction between laser radiation and matrix material as well as fibres are discussed considering the different heat deposit and absorption behaviour of the emitted radiations.

引用

页码：350 / 363

页数：14

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