Citation:
R.J.L. Steenbakker, R.G. Wellman, J.R. Nicholls, Erosion of gadolinia doped EB-PVD TBCs, Surface and Coatings Technology, Volume 201, Issue 6, 4 December 2006, Pages 2140-2146
Abstract:
Gadolinia additions have been shown to significantly reduce the thermal
conductivity of EB-PVD TBCs. The aim of this paper is to further the
understanding on the effects of dopants on the erosion resistance of EB-PVD TBCs
by studying the effects of 2 mol% Gd2O3 additions on the room and high
temperature erosion resistance of as received and aged EB-PVD TBCs. Previously
it has been reported that gadolinia additions increased the erosion rate of EB-
PVD TBCs, this is indeed the case for room temperature erosion, however under
high temperature (825 à °C) erosion conditions this is not the case and the doped
TBCs have a slightly lower erosion rate than the standard YSZ EB-PVD TBCs. This
has been attributed to a change in the erosion mechanisms that operate at the
different temperatures. This change in mechanism was not expected under the
impact conditions used and has been attributed to a change in the column
diameter, and how this influences the dynamics of particle impaction
