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 Electronics and Fluidics Electrical and Electronic Equipment |
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An Interdisciplinary Approach to Predictive Modeling of Structural Adhesive Bonding. Factors Affecting the Durability of Titanium/Epoxy Bonds
Authors: J. A. Filbey; J. P. Wightman; VIRGINIA TECH CENTER FOR ADHESION SCIENCE BLACKSBURG |
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Abstract: Factors influencing the durability of Titanium-6-4 / epoxy and Ti-6-4 / metal alkoxide / epoxy interphases were studied by first determining chemical and HYSICAL PROPERTIES OF Ti-6-4 adherend surfaces; second by characterizing the strength and durability of Ti-6-4 / epoxy bonds; and third by using aluminum and titanium alkoxides as possible adhesion promoters. Ti-6-4 adherend surfaces were oxidized either by chemical etch or anodization. Four principal pretreatments were studied: chromic acid anodization (CAA), sodium hydroxide anodization (SHA) , phosphate fluoride acid etch (P/F), and TURCO basic etch (TURCO). The oxides were characterized physically by SEM, STEM, profilometry, and contact angles; and chemically by XPS, AES, SIMS, and indicator dyes. The two anodically produced oxides were porous, with pore diameters of 40 to 50 nm, while P/F and TURCO pretreated adherends showed no porosity. Good reproducibility of oxide composition was seen by XPS. The acidity/basicity of the surfaces was found to be in order of increasing basicity CAA < P/F < TURCO < SHA.
| Description: |
Summary rept. |
| Pages: |
320 |
| Report Date: |
OCT 87 |
| Contract Number: |
N00014-82-K-0185 |
| Report Number: |
A305981 |
Report Unavailable |
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