Abstract
In previous studies, it has been demonstrated that nanostructured Al2O3-13 wt.%TiO2 coatings deposited via air plasma spray (APS) exhibit higher wear resistance when compared to that of conventional coatings. This study aimed to verify if high-velocity oxy-fuel (HVOF)-sprayed Al2O3-13 wt.%TiO2 coatings produced using hybrid (nano + submicron) powders could improve even further the already recognized good wear properties of the APS nanostructured coatings. According to the abrasion test results (ASTM G 64), there was an improvement in wear performance by a factor of 8 for the HVOF-sprayed hybrid coating as compared to the best performing APS conventional coating. When comparing both hybrid and conventional HVOF-sprayed coatings, there was an improvement in wear performance by a factor of 4 when using the hybrid material. The results show a significant antiwear improvement provided by the hybrid material. Scanning electron microscopy (SEM) at low/high magnifications showed the distinctive microstructure of the HVOF-sprayed hybrid coating, which helps to explain its excellent wear performance.
Similar content being viewed by others
References
M. Gell, E.H. Jordan, Y.H. Sohn, D. Goberman, L. Shaw, and T.D. Xiao, Development and Implementation of Plasma Sprayed Nanostructured Ceramic Coatings, Surf. Coat. Technol., Vol 146-147, 2001, p 48-54
J. Ahn, B. Hwang, E.P. Song, S. Lee, and N.J. Kim, Correlation of Microstructure and Wear Resistance of Al2O3-TiO2 Coatings Plasma Sprayed with Nanopowders, Metall. Mater. Trans. A, Vol 37A, 2006, p 1851-1861
R.S. Lima and B.R. Marple, From APS to HVOF Spraying of Conventional and Nanostructured Titania Feedstock Powders: a Study on the Enhancement of the Mechanical Properties, Surf. Coat. Technol., Vol 200, 2000, p 3428-3437
G.R. Anstis, P. Chantikul, B.R. Lawn, and D.B. Marshall, A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I. Direct Crack Measurements, J. Am. Ceram. Soc., Vol 64 (9), 1981, p 1073-1082
Standard Test Method for Measuring Abrasion Using the Dry Sand/Rubber Wheel Apparatus, G65-00, Annual Book of ASTM Standards, ASTM 2000, p 1-12
R.S. Lima and B.R. Marple, Optimized HVOF Titania Coatings. J. Therm. Spray Technol., 2003, 12(3), p 360-368
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.
Rights and permissions
About this article
Cite this article
Lima, R.S., Moreau, C. & Marple, B.R. HVOF-Sprayed Coatings Engineered from Mixtures of Nanostructured and Submicron Al2O3-TiO2 Powders: An Enhanced Wear Performance. J Therm Spray Tech 16, 866–872 (2007). https://doi.org/10.1007/s11666-007-9092-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11666-007-9092-x