Development of Nanostructured Al2O3-Ni HVOF Coatings
HVOF thermal spraying has been developed to deposit dense Al2O3-coatings for improved protective properties. As compared to generally used plasma sprayed coatings HVOF coatings can be prepared much denser and thus are better suited for applications where protective properties of the coating are needed. In this paper we describe the development of HVOF spraying technologies for nanocrystalline Al2O3- and Al2O3-Ni-coatings. The microstructure and the mechanical properties of these novel coatings are reported and compared to a conventionally processed Al2O3-coating.
T. Ohji, T. Sekino and K. Niihara
S. P. Hannula, E. Turunen, J. Keskinen, T. Varis, T. Fält, T. E. Gustafsson, R. Nowak, "Development of Nanostructured Al2O3-Ni HVOF Coatings", Key Engineering Materials, Vols. 317-318, pp. 539-544, 2006