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Genesis of the third-body at the pad-disc interface: case study of sintered metal matrix composite lining material

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2009
auteur(s) Desplanques Yannick; Degallaix Gérard
journal (abréviation) SAE International Journal of Materials and Manufacturing (SAE Int. J. Mater. Manuf.)
volume (numéro) 2
numéro de papier 2009-01-3053
pages 24 – 32
résumé During braking, third-body flows and layers govern friction mechanisms, which are fully responsible of the friction coefficient and wear. In the context of development of brake friction pairs, the involved tribological circuit has to be well understood and mastered. This paper concerns a sintered metal matrix composite used for TGV very high speed train. A series of low-energy stop brakings allows a detailed study of the third-body formation at the pad-disc contact. The pin surface is observed after each test. The evolution of the rubbing-area expansion all along the series is explained, and the friction behaviour, typical of the studied friction material, is related to the formation of a well-established third body at the pad-disc interface.
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