Vacuum tribological behaviour of self lubricant quasicrystalline composite coatings

Garcia de Blas Villanueva, Francisco Javier and Miguel, C. de and Longo, F. and Muelas, R. and Agüero, A. (2003). Vacuum tribological behaviour of self lubricant quasicrystalline composite coatings. In: "10th European Space Mechanisms and Tribology Symposium", 24/09/2003-26/09/2003, San Sebastián, España. ISBN 92-9092-834-4.

Description

Title: Vacuum tribological behaviour of self lubricant quasicrystalline composite coatings
Author/s:
  • Garcia de Blas Villanueva, Francisco Javier
  • Miguel, C. de
  • Longo, F.
  • Muelas, R.
  • Agüero, A.
Item Type: Presentation at Congress or Conference (Article)
Event Title: 10th European Space Mechanisms and Tribology Symposium
Event Dates: 24/09/2003-26/09/2003
Event Location: San Sebastián, España
Title of Book: Proceedings of 10th European Space Mechanisms and Tribology Symposium
Date: September 2003
ISBN: 92-9092-834-4
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-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 BaF2-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.

More information

Item ID: 7324
DC Identifier: http://oa.upm.es/7324/
OAI Identifier: oai:oa.upm.es:7324
Official URL: http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=33776
Deposited by: Memoria Investigacion
Deposited on: 03 Jun 2011 10:54
Last Modified: 20 Apr 2016 16:29
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