Experimental study of the speed-dependence tribotechnical characteristics of some plasma-sprayed oxide coatings at elevated temperatures |
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| Authors: | B Y Sachek A M Mezrin A N Zaytzev |
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| Affiliation: | 1. Ishlinskii Institute of Problems of Mechanics, Russian Academy of Sciences, prosp. Vernadskogo 101, korpus 1, Moscow, 119526, Russia
2. Blagonravov Institute of Mechanical Engineering, Russian Academy of Sciences, Malyi Kharitonyevskii per. 4, Moscow, 101990, Russia
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| Abstract: | The effect of the sliding speed on friction and wear characteristics of plasma-sprayed ceramic coatings (Al2O3-13% TiO2, ZrO2-8% Y2O3, Al2O3-modified) was studied. Plasma-sprayed coatings are not hard and have high layered structure. Abrasion of coatings in the friction pair with steel and bronze counter-bodies occurs through brittle detachment conglomerated regions with low cohesive resistance. The modified coating (Al2O3) has the highest wear resistance and the lower coefficient of friction compared to the coatings (Al2O3-13% TiO2, ZrO2-8% Y2O3) in the studied velocity range (0.1–10 mm/s). Laser melting can be used as an efficient way of increasing the tribotechnical properties of plasma-sprayed oxide coatings. |
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