Title: Determination of interfacial fracture energy for 'pop-in' delaminations in a glass-epoxy system using the indentation method

Authors: Karen Hutchins; Thomas Buchheit; Rajan Tandon; Tariq Khraishi

Addresses: US Bureau of Reclamation, Lahontan Basin Area Office, 705 North Plaza Street, Carson City, NV 89701-4015, USA ' Center for Materials and Process Sciences, Sandia National Laboratories, Dept: 01851 MS: 0889, Albuquerque, NM 87185, USA ' Analytical Technologies Department, Sandia National Laboratories, Albuquerque, NM 87185, USA ' Mechanical Engineering Department, University of New Mexico, MSC01 1150, Albuquerque, NM 87131, USA

Abstract: The adhesion of coatings often controls the performance of the substrate-coating system. Certain engineering applications require an epoxy coating on a brittle substrate to protect and improve the performance of the substrate. Interfacial adhesion measurements of such systems provide a quantitative metric of that performance. Indentation experiments were performed to induce interfacial delaminations in a glass substrate-epoxy coating system. Delamination loads and radii were measured and applied to an analytical solution originally developed by Rosenfeld et al. (1990) to estimate the interfacial fracture energy of the substrate-coating adhesive bond. Results suggest an interfacial bond strength far exceeding that of similar previously studied glass-epoxy systems.

Keywords: indentation; adhesion; bonding; interfaces; coatings; epoxy; glass; fracture energy.

DOI: 10.1504/IJTAMM.2018.096411

International Journal of Theoretical and Applied Multiscale Mechanics, 2018 Vol.3 No.2, pp.116 - 126

Available online: 22 Nov 2018 *

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