Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings
Source abstract
Abstract
Atmospheric plasma spraying is used to deposit alumina and alumina-graphite composite coatings. The influence of arc current (plasma temperature) on the microstructure, roughness, elemental composition, and phase composition of the coatings is analyzed by scanning electron microscopy (SEM), surface roughness testing, energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The tribological properties of the sprayed coatings are analyzed using a tribometer with a ball-on-flat configuration. The roughness of the as-sprayed coatings increases and the size of the granules decreases with the increase in plasma temperature. The results demonstrate that the friction coefficients and wear rates are slightly reduced for Al2O3 coatings sprayed at higher arc currents. The Al2O3-graphite coatings register lower friction coefficient values than the Al2O3 coatings under dry sliding conditions.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Metal and Thin Film Mechanics · Tribology and Wear Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Kaunas University of Technology, Studentu Str. 50, LT-51368 Kaunas, Lithuania
Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania
Laboratory for Tribology and Interface Nanotechnology, Faculty of Mechanical Engineering, University of Ljubljana, Bogišićeva 8, 1000 Ljubljana, Slovenia
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