Vacuum Tribological Behaviour of Self-Lubricating Quasicrystalline Composite Coatings

Garcia de Blas Villanueva, Francisco Javier and Roman, A. and Miguel, C. de and Longo, F. and Muelas, R. and Agüero, A. (2004). Vacuum Tribological Behaviour of Self-Lubricating Quasicrystalline Composite Coatings. "Tribotest", v. 11 (n. 2); pp. 103-111. ISSN 1354-4063. https://doi.org/10.1002/tt.3020110203.

Description

Title: Vacuum Tribological Behaviour of Self-Lubricating Quasicrystalline Composite Coatings
Author/s:
  • Garcia de Blas Villanueva, Francisco Javier
  • Roman, A.
  • Miguel, C. de
  • Longo, F.
  • Muelas, R.
  • Agüero, A.
Item Type: Article
Título de Revista/Publicación: Tribotest
Date: December 2004
ISSN: 1354-4063
Volume: 11
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

High-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 BaF2CaF2 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

More information

Item ID: 7316
DC Identifier: http://oa.upm.es/7316/
OAI Identifier: oai:oa.upm.es:7316
DOI: 10.1002/tt.3020110203
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/tt.3020110203/abstract
Deposited by: Memoria Investigacion
Deposited on: 03 Jun 2011 11:32
Last Modified: 20 Apr 2016 16:28
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