Copyright © 2004 John Wiley & Sons, LtdGarcía de Blas, F. J.Román, A.De Miguel, C.Longo, FedericoMuelas Gamo, RaúlAgüero, A.2025-01-152025-01-152006-03-09Tribotest 11: 103-111(2006)1354-4063https://onlinelibrary.wiley.com/doi/10.1002/tt.3020110203http://hdl.handle.net/20.500.12666/962High-temperature-resistant self-lubricating coatings are needed in space vehicles for components that operate at high temperatures and/or under vacuum. Thick composite lubricant coatings containing quasicrystalline alloys as the hard phase for wear resistance can be deposited by a thermal spray technique. The coatings also contain lubricating materials (silver and BaF2CaF2 eutectic) and NiCr as the tough component. This paper describes the vacuum tribological properties of TH103, a coating of this type, with a very good microstructural quality. The coating was deposited by high-velocity oxygen fuel spraying and tested under vacuum using a pin-on-disc tribometer. Different loads, linear speeds, and pin materials were studied. The pin scars and disc wear tracks were characterised using a combination of scanning electron microscopy and energy dispersive spectrometry. A minimum mean steady friction coefficient of 0.32 was obtained when employing an X750 Ni superalloy pin in vacuum conditions under 10 N load and 15 cm/s linear speed, showing moderate wear of the disc and low wear of the pin.engquasicrystalline alloyscomposite powderself-lubricating coatingsvacuum pin-on-disc testHVOFfrictionwearinfo:eu-repo/semantics/article10.1002/tt.30201102031557-685Xinfo:eu-repo/semantics/restrictedAccess