Microstructure, Phase Components, and Tribological Properties of Al65Cu20Fe15 Quasicrystal Coatings Deposited by HVOF
Kurbanbekov S. Gaipov T. Saidakhmetov P. Tazhibayev A. Ramankulov S. Bekbayev S. Abdimutalip A. Baltabayeva D.
July 2025Multidisciplinary Digital Publishing Institute (MDPI)
Lubricants
2025#13Issue 7
Quasicrystalline coatings based on Al65Cu20Fe15 are of increasing interest as potential alternatives to conventional wear-resistant materials due to their unique structural and tribological properties. This study explores the influence of air pressure during high-velocity oxy-fuel (HVOF) spraying on the phase composition, morphology, and wear behavior of Al65Cu20Fe15 coatings deposited on U8G tool steel. Coatings were applied at a fixed spraying distance of 350 mm using three air pressures (1.9, 2.1, and 2.3 bar), with constant propane (2.0 bar) and oxygen (2.1 bar) supply. X-ray diffraction analysis identified the formation of Al78Cu48Fe14 and Al0.5Fe1.5 phases, while scanning electron microscopy revealed a dense, uniform microstructure with low porosity and homogeneous element distribution across all samples. Tribological testing using the ball-on-disk method showed wear track widths ranging from 853.47 to 952.50 µm, depending on the air pressure applied. These findings demonstrate that fine-tuning the air pressure during HVOF spraying significantly influences the structural characteristics and wear resistance of the resulting quasicrystalline coatings, highlighting their promise for advanced surface engineering applications.
Al65Cu20Fe15 , HVOF , microstructure , tribology , U8G , wear resistance
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Department of Physics, International Kazakh-Turkish University Named H.A.Yasavi, Turkestan, 161200, Kazakhstan
LLP “Institute of Innovative Technologies and New Materials”, Turkestan, 161200, Kazakhstan
Department of Physics, M. Auezov South Kazakhstan University, Tauke Khan Ave. 5, Shymkent, 160012, Kazakhstan
LLP “ALCOR”, Almaty, 050043, Kazakhstan
Department of Physics
LLP “Institute of Innovative Technologies and New Materials”
Department of Physics
LLP “ALCOR”
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