Journal
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Volume 48, Issue -, Pages 20-27Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijadhadh.2013.09.012
Keywords
Titanium and alloys; Surface treatment; Epoxy/epoxides; Surface analysis
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In this investigation, the effect of mechanical and chemical treatments on titanium for bonding to a rubber toughened epoxy adhesive has been examined. Titanium alloy was roughened using either abrasion or grit-blasting techniques. An air-plasma treatment of the titanium prior to organosilane treatment also improved uniformity of the resultant thin film as determined by AFM and XPS. Grit-blasting significantly increased the titanium surface roughness and increased the alumina character of the surface layers. The fracture toughness of the epoxy-titanium bonds, as measured by the wedge test, was affected by the degree of surface roughness at short humid-exposure times. Further, the addition of a thin organosilane film to the titanium slowed degradation rates and led to higher fracture toughness at longer humid-exposure times. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
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