Citation:
R. G. Wellman and J. R. Nicholls, A Mechanism for the Erosion of EB PVD TBCS, Materials Science Forum, Vols 369-372, 2001, pp. 531-338
Abstract:
Since the introduction of electron beam (EB) physical vapour deposition (PVD) TBCs
and their application to moving components in the hot gas stream, erosion has become a prime
concern. This project has been involved in determining the erosion mechanism of EB PVD TBCs,
in order to develop a computational erosion model. The unique columnar microstructure of the
EB PVD TBCs precludes the use of the classical brittle erosion mechanisms. This meant that a
thorough investigation into the erosion mechanism of the coatings was necessary before it would
be possible to develop a model to predict material wastage.