Microstructure and abrasion resistance of plasma sprayed titania coatings |
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Authors: | P Ctibor K Neufuss P Chraska |
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Affiliation: | (1) Institute of Plasma Physics ASCR, Za Slovankou 3, 182 00 Praha 8, Czech Republic |
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Abstract: | Agglomerated titania nanopowder and a “classical” titania were sprayed by the high throughput water-stabilized plasma (WSP)
and thoroughly compared. Optical microscopy with image analysis as well as mercury intrusion porosimetry were used for quantification
of porosity. Results indicate that the “nano” coatings in general exhibit finer pores than coatings of the “conventional”
micron-sized powders. Mechanical properties such as Vickers microhardness and slurry abrasion response were measured and linked
to the structural investigation. Impact of the variation in the slurry composition on wear resistance of tested coatings and
on character of the wear damage is discussed. The overall results, however, suggest that the “nano” coatings properties are
better only for carefully selected sets of spraying parameters, which seem to have a very important impact.
This article was originally published inBuilding on 100 Years of Success, Proceedings of the 2006 International Thermal Spray Conference (Seattle, WA), May 15–18, 2006, B.R. Marple, M.M. Hyland, Y.-Ch. Lau, R.S. Lima, and J. Voyer, Ed., ASM International, Materials
Park, OH, 2006. |
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Keywords: | image analysis slurry abrasion titanium oxide waterstabilized plasma |
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