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, 11 (2). 103 - 111. ISSN 1354-4063
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| Item Type: | Article | ||||||||||||||
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| Title: | Vacuum Tribological Behaviour of Self-Lubricating Quasicrystalline Composite Coatings | ||||||||||||||
| Publisher: | Wiley-Blackwell | ||||||||||||||
| Journal/Publication Title: | Tribotest | ||||||||||||||
| Date: | December 2004 | ||||||||||||||
| Volume: | 11 | ||||||||||||||
| Number: | 2 | ||||||||||||||
| Department: | Other | ||||||||||||||
| Faculty: | E.T.S.I. Aeronautical (UPM) | ||||||||||||||
| Creative Commons licenses: | Recognition - No derivative works - No commercial | ||||||||||||||
| Item ID: | 7316 | ||||||||||||||
| Subjects: | Aeronautics Materials |
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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/tt.3020110203/abstract
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
| Item Type: | Article |
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| Subjects: | Aeronautics Materials |
| Código ID: | 7316 |
| Depositado Por: | Memoria Investigacion |
| Depositado el: | 03 Jun 2011 13:32 |
| Last Modified: | 14 Oct 2011 11:50 |
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