Citation:
Céline Viazzi, Richard Wellman, Djar Oquab, John R. Nicholls, Daniel Monceau, Jean Pierre Bonino, Florence Ansart, Erosion and high temperature oxidation resistance of new coatings fabricated by a sol-gel route for a TBC application, Materials Science Forum, Volumes 595 - 598, 2008, Pages 3-10.
Abstract:
This paper examines the erosion and cyclic oxidation performance of novel thermal
barrier coatings produced via the sol-gel route. The ceramic top coat, with a thickness of 5-
25µm, was deposited via a sol-gel route onto standard MCrAlY and PtAl bond coats. In both the
erosion and the cyclic oxidation tests it was found that the bond coat had a profound affect on the
results. The erosion of the sol-gel coatings were compared to standard EB PVD and PS TBCs
and were found to be significantly higher. The effect of aging (100hr at 1100°C) on the erosion
rates was also evaluated and was found to increase the erosion rates. The information obtained
from the erosion and cyclic oxidation tests have highlighted the need to develop and optimise the
parameters for producing thicker coatings.
