Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1663307 | Surface and Coatings Technology | 2006 | 7 Pages |
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 °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.
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Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
R.J.L. Steenbakker, R.G. Wellman, J.R. Nicholls,