Centre for Advanced Materials Processing
and Manufacturing

Seminar: Crack initiation in aircraft coatings

AMPAM Seminar Series

Event Details

Date: Tuesday, 03 June 2014
Venue: 49-502
Speaker: Donna Capararo
Event Description: 
Paint coatings provide an important barrier layer to protect an aircraft from corrosion. Coatings initially start as ductile and flexible, but through processes of age, temperature and loading cycling it transitions into brittle coatings which can crack. Cracks in coatings allow water to ingress to the metal surface to form microenvironments that lead to corrosion. Maintaining the integrity of the paint coating is foremost in the prevention of corrosion, but accurately predicting its lifetime can lead to savings in aircraft maintenance costs. This project will investigate mechano-chemical rate determining step and mechanisms of crack initiation for aircraft coatings, which consist of a polyurethane topcoat and epoxy primer. Techniques such as tensile testing, dynamic mechanical thermal analysis, ATR-FTIR spectroscopy and microscopy techniques will be used in conjunction with traditional paint tests to investigate the films at the various stages of aging. Aged films are generated through UV and/or moisture exposure. The results will be used to develop a mechanistic model to predict coatings lifetime. This PhD project is sponsored by the Defense Materials Technology Centre and is carried out at the Australian Institute for Bioengineering and Nanotechnology at the University of Queensland. It integrates with PhD projects in Mechanical Engineering at the University of Queensland and postdoctoral work at RMIT.

Event Attachments

Contact: Brianne Mackinnon
Email: enquiries@mechmining.uq.edu.au