Browsing by Author "Wellman, R. G."

Browsing by Author "Wellman, R. G."

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  • Wellman, R. G.; Nicholls, J. R. (Trans Tech Publications, Switzerland., 2000-07-10)
    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 ...
  • Wellman, R. G.; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2004-05-01)
    Since the introduction of electron beam (EB) physical vapour deposition (PVD) thermal barrier coatings (TBCs) and their application to moving components in the hot gas stream, erosion has become a prime concern. EB PVD ...
  • Tryon, B.; Feng, Q.; Wellman, R. G.; Murphy, K. S.; Yang, J.; Levi, C.G.; Nicholls, J. R.; Pollock, T. M. (Springer Verlag, 2006-11)
    Diffusional approaches for fabrication of multi-layered Ru-modified bond coats for thermal barrier coatings have been developed via low activity chemical vapor deposition and high activity pack aluminization. Both processes ...
  • Wellman, R. G.; Dyer, A.; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2004-01-01)
    In order to model the erosion of a material it is necessary to know the material properties of both the impacting particles as well as the target. In the case of electron beam (EB) physical vapour deposited(PVD) thermal ...
  • Wellman, R. G.; Tourmente, H.; Impey, S. A.; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2004-11-01)
    Previous studies on the erosion of electron beam physical vapour deposited thermal barrier coatings (EB PVD TBCs) has shown that aging the coatings at between 1100 and 1500 à °C before erosion increases the erosion rate. ...
  • Wellman, R. G.; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2004-01-30)
    Thermal barrier coatings have been used in gas turbine engines for some four decades, and the erosion resistance of these coatings has been well documented over the years by various different groups. However, as far as ...
  • Wellman, R. G.; Scrivani, A.; Rizzi, G.; Weisenburger, A.; Tenailleau, F H; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2007-12-01)
    This paper discusses the effect of pulsed electron beam (PEB) treatment of thermal sprayed MCrAlY bondcoats on the cyclic life of thermal barrier coatings (TBCs). Standard MCrAlY bondcoats were produced via HVOF, VPS and ...
  • Wellman, R. G.; Nicholls, J. R. (Iop Publishing Ltd, 2007-08-21)
    The application of thermal barrier coatings (TBCs) to components with internal cooling in the hot gas stream of gas turbine engines has facilitated a steep increase in the turbine entry temperature and the associated ...
  • Wellman, R. G.; Nicholls, J. R. (Elsevier Science B.V., Amsterdam., 2000-07-10)
    Following the successful application of electron beam (EB) physical vapour deposition (PVD) thermal barrier coatings (TBCs) to moving parts of turbine engines, the erosion resistance of these coatings has been of interest ...