Abstract
This work presents an original way for preparing TiO-based coatings by thermal spraying. As titanium monoxide is oxidized by the mere trace of oxygen contained in hydrogen, it is obvious that plasma spraying of TiO powder does not lead easily to the formation of a titanium monoxide coating. However, thermodynamical calculations show that the conditions necessary for the preparation of TiO can be reached, at the titanium melting temperature (Tm=1933 K), when oxygen reacts with liquid metal in the presence of excess carbon. These results have led to experiments in which TiO-based coatings have been prepared by spraying a stoichiometric mixture of graphite and titanium grains onto cast iron in air. In optimal conditions, a gas-tight hard coating (1000 ± 15 HV3) of a TiO-based phase (composition: TiO0.81±0.06C0.04±0.02) has been obtained.
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References
H. Pastor: Titanium-carbonitride-based hard alloys for cutting tools. Mater. Sci. Eng. A105/106, 401 (1988).
P.T.B Shaffer: Materials Index No.1 (Plenum Press, New-York, 1964).
D.J. Varacalle, L.B. Lundberg, H. Herman, G. Bancke: Titanium carbide coatings fabricated by the vacuum plasma spraying process. Surf. Coat. Technol. 86–87, 70 (1996).
B. Haller, J.P. Bonnet, P. Fauchais, A. Grimaud, and J.C. Labbe: TiC based coatings prepared by combining SHS and plasma spraying, in Thermal Spray Solutions: Advances in Technology and Application, Proceedings of the International Thermal Spray Conference, ITSC 2004, Osaka, Japan (ASM International, Materials Park, OH).
O. Knacke, O. Kubaschewski, K. Hesselmann: Thermo-Chemical Properties of Inorganic Substances Vol. I, 2nd ed. (Springer-Stahleisen, 1991).
O. Knacke, O. Kubaschewski, K. Hesselmann: Thermo-Chemical Properties of Inorganic Substances Vol. II, 2nd ed. (Springer-Stahleisen, 1991).
J.P. Bonnet: Oxygen partial pressure and mineral synthesis, Thèse 3èmecycle de l’Université de Bordeaux 1 (1974), p. 73.
P. Courbin, J.P. Bonnet, J.P. Chamnade, G. Le Flem: A new method for the preparation of Ti2O3. Rev. Chim. Min. 15, 508 (1978).
H. Luhleich, J. Dias, H. Nickel: The coat-mix procedure using carbon fillers. Carbon 5(1), 95 (1997).
P. Fauchais, M. Vardelle: Plasma spraying, present and future. Pure Appl. Chem. 66,1247 (1994).
M. Vardelle, A. Vardelle, A. Denoirjean: Thermal plasma-particle interactions: Diagnostic techniques. J. High Temp. Chem. Proc. 1, 445 (1992).
JCPDS 32-1383 (Joint Committee for Powder Diffraction Studies).
O. Pascal: New treatise of mineral chemistry, vol IX (Titanium, Zirconium, Hafnium, Thorium), (Masson et Cie, Paris, 1963).
JCPDS 38-1420 (Joint Committee for Powder Diffraction Studies).
JCPDS 8-117 (Joint Committee for Powder Diffraction Studies).
O. Masson: Peakoc, Profile fitting computer program, SPCTS, Limoges, France (1998).
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Haller, B., Grimaud, A., Labbe, JC. et al. TiO-based coatings prepared by plasma spraying in air of Ti + C mixtures. Journal of Materials Research 21, 1770–1774 (2006). https://doi.org/10.1557/jmr.2006.0203
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DOI: https://doi.org/10.1557/jmr.2006.0203