Mechanical Engineering ETDs

Publication Date

9-1-2015

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. Experimental observations and measurements of interfacial adhesion in glass-epoxy systems are described in this thesis. A comparison study of how different glass treatments affect adhesion was also conducted: smooth versus rough, clean versus unclean, stressed versus non-stressed. The Oliver and Pharr method was utilized to calculate the bulk epoxy hardness and elastic modulus. Spherical indentations were used to induce delaminations at the substrate-coating interface. The delamination sizes as a function of load were used to calculate the interfacial toughness. The interfacial fracture energy of my samples is an order of magnitude higher than a previous group who studied a similar glass-epoxy system.

Keywords

Adhesion, Indentation, Glass, Epoxy, Interfaces, Bonding, Coatings

Degree Name

Mechanical Engineering

Level of Degree

Masters

Department Name

Mechanical Engineering

First Committee Member (Chair)

Tehrani, Mehran

Second Committee Member

Tandon, Rajan

Sponsors

Sandia National Laboratories

Document Type

Thesis

Language

English

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