High temperature resistant self-lubricant coatings are needed in space vehicles for components that operate at high temperatures and/or under vacuum. Thick composite lubricant coatings containing quasicrystalline alloys (QC) as the hard phase for wear resistance, have been deposited by thermal spray. The coatings also comprise lubricating materials (silver and BaF 2-CaF2 eutectic) and NiCr as the tough component. This paper describes the vacuum tribological properties of TH103, a coating belonging to this family, with excellent microstructural quality. The coating was deposited by HVOF and tested under vacuum on a pin-on-disc tribometer. Different loads, linear speeds and pin materials were studied. The pin scars and disc wear tracks were characterized by EDS-SEM. A minimum mean steady friction coefficient of 0.32 was obtained employing a X-750 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.
Vacuum tribological behaviour of self lubricant quasicrystalline composite coatings
2003
5 Seiten, 14 Quellen
Conference paper
English
Vacuum Tribological Behaviour of Self Lubricant Quasicrystalline Composite Coatings
British Library Conference Proceedings | 2003
|Tribological behaviour of hard coatings
Automotive engineering | 1998
|Tribological Behaviour of PEEK Composites in Vacuum Environment
British Library Conference Proceedings | 2007
|Development of TiN/MoS2 composite tribological coatings for cryocoolers
Tema Archive | 2004
|