Abstract
Alumina, Al2O3 + 3 to 40 wt% TiO2, and Al2O3 + 40 wt% ZrO2 coatings were deposited by atmospheric plasma spraying (APS) and detonation gun spraying (DGS). The coatings were evaluated by optical microscopy, microhardness measurements, and X- ray diffraction. Wear resistance of the coatings was evaluated by rubber wheel sand abrasion and particle erosion test methods. Detonation gun- sprayed coatings exhibited more homogeneous microstructures and somewhat higher microhardness than corresponding plasma- sprayed coatings. Small additions of TiO2 (3 wt%) improved both the abrasion and erosion wear resistance, whereas 40 wt% TiO2 significantly decreased the erosion wear resistance of both APS and DGS coatings. Alumina + 40% ZrO2 coatings exhibited the best abrasion wear resistance of both APS and DGS coatings, but the erosion wear resistance of these coatings was lower than that of the Al2O3 and Al2O3 + 3 wt% TiO2 coatings. The best abrasion wear resistance of the coatings studied was obtained with DGS Al2O3 + 40 wt% ZrO2 and Al2O3 + 3 to 40 wt% TiCh coatings. These coatings exhibited lower wear rates than bulk Al2O3. The best erosion wear resistance was obtained with the DGS Al2O3 + 3 wt% TiO2 coating; however, it exhibited a higher wear rate than bulk Al2O3. In general, detonation gun- sprayed coatings showed significantly enhanced abrasion and erosion wear resistance than the corresponding plasma- sprayed coatings.
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References
S. Safai,“A Microstructural Investigation of Plasma Sprayed Metal and Oxide Coatings,” Doctoral thesis, State University of New York, Stony Brook, May 1979, University Microfilm No. 7919359
H.L. Filmer, J. Hochstrasser, A.R. Nicoll, and S. Rangaswamy, Plasma Spray Deposition of Alumina-Based Ceramic Coatings,Ceram. Bull., Vol 69 (No. 12), 1990, p 1955–1958
F. Beltzung, G. Zambelli, E. Lopez, and A.R. Nicoll, Fracture Tough- ness of Plasma Sprayed Ceramic Coatings,Thin Solid Films, Vol 181, 1989, p 407–415
P. Vuoristo, K. Niemi, and T. Mäntyl:a, Hard Oxide Coatings Deposited by Plasma and Detonation Gun Spraying Techniques,Proc. 2nd Plasma-Technik-Symp., Lucerne, Switzerland, S. Blum-Sandmeier, H. Eschnauer, P. Huber, and A.R. Nicoll, Ed., Plasma-Technik AG, Wo- hlen, Switzerland, 1991, p 323–331
K. Niemi, P. Vuoristo, and T. Mäntylä, Chromium Oxide Coatings De- posited by Plasma Spraying and Detonation Gun Spraying,Proc. 2nd Plasma-Technik-Symp., Lucerne, Switzerland, S. Blum-Sandmeier, H. Eschnauer, P. Huber, and A.R. Nicoll, Ed., Plasma-Technik AG, Wo- hlen, Switzerland, 1991, p 311 -322
K. Niemi, P. Vuoristo, A. Mäkelä, P. Sorsa, and T. Mäntylä, Comparison of Plasma Sprayed and Detonation Gun Sprayed Alumina-Magnesia and Alumina-Titania Coatings,Proc. Fifth Int. Conf. Surface Modifi- cation Technol., T.S. Sudarshan and J.F. Braza, Ed., The Institute of Materials, Birmingham, UK, 1992, p 571–580
P. Vuoristo, K. Niemi, and T. Mäntylä, On the Properties of Detonation Gun Sprayed and Plasma Sprayed Ceramic Coatings,Thermal Spray: International Advances in Coatings Technology, C.C. Berndt, Ed., ASM International, 1992, p 171–175
Yu. S. Borisov, E.A. Astakhov, and V.S. Klimenko, Detonation Spray- ing: Equipment, Materials and Applications, Proc. Int. DVS-Conf., Thermal Spraying Conf., TS ’90, 1990, Essen, FRG, p 26–31
“Standard Practice for Conducting Dry Sand/Rubber Wheel Abrasion Tests,” ASTM G65-85, ASTM, 1985
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An erratum to this article is available at http://dx.doi.org/10.1007/BF02646266.
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Niemi, K., Vuoristo, P. & Mäntylä, T. Properties of alumina-based coatings deposited by plasma spray and detonation gun spray processes. JTST 3, 199–203 (1994). https://doi.org/10.1007/BF02648279
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DOI: https://doi.org/10.1007/BF02648279