THE TRIBOLOGICAL STUDIES OF PLASMA-SPRAYED CERAMIC COATINGS
Journal Title: Tribologia - Year 2010, Vol 230, Issue 2
Abstract
Plasma-sprayed coatings on the base of ceramic powders Al2O3, Al2O3-В and Al2O3-Mo were investigated. The thickness of coatings after processing was equal to 0.5–0.7 mm, the base material was steel C45. The analysis of metallographic samples of coatings allowed us to find that ceramic coatings consists of quasi-molten and then harden particles. The molten intensity of coating material Al2O3-В is more in comparison with other materials. Research using frictionwear machine of the Amsler type determined that values of the friction coefficient for coatings are practically equal when dry friction. The presence of gearbox oil decreases the friction coefficients of the researched coatings by about 3 to 4 times in comparison with dry friction conditions. During dry friction and friction with gearbox oil, the surface of Al2O3 coating abrades more quickly in comparison with coats alloyed. The relative solid wear of ceramic coating alloyed by boron is considerably smaller in comparison with other coatings. The presence of oil decreases relative solid wear of researched coatings more then 20 times in comparison with dry friction conditions according to the peculiarity of friction pair work. The presence of oil guarantees the removal of wear products successfully from the friction area.<br/><br/>
Authors and Affiliations
Eugene Feldshtein, Alicja Laber, Oleg Devojno, Olga Yatskievich
Keywords
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