2024 Volume 50 Issue 3 Pages 107-114
This paper presents the findings of an experimental investigation into the strength properties of joint adhesives employed in flame-applied surface treatment, a critical process in adhesive bonding techniques. Among the commercial surface treatment techniques, this study focuses on Itro treatment to analyze the silica deposition flame-applied surface treatment method. Dispersed conditions of silica particles on surfaces, tensile strength, and microscopic fractures are observed using focused ion beam and scanned probe microscopy for varying numbers of Itro treatment passes. Adhesive joint strength either improves or remains constant after 1 or 6 Itro treatment passes compared to non-Itro treatment. In contrast, strength decreases after 30 or 60 Itro treatment passes. During Itro treatment, silica particles form a silica layer with a cohesive fracture mode. The strength of the silica layer is estimated to be lower than the interface strength between the adherend and adhesive.
