Ultra-low friction coefficient in alumina-silicon nitride pair lubricated with water
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
10/10/2013
10/10/2013
2012
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Resumo |
In a ball-on-disc wear test, an alumina ceramic body sliding against a silicon nitride ceramic body in water achieved an ultra-low friction coefficient (ULFC) of 0.004. The profilometer and EDX measurements indicated that the ULFC regime in this unmated Al2O3-Si3N4 pair was achieved because of the formation of a flat and smooth interface of nanometric roughness, which favored the hydrodynamic lubrication. The triboreactions formed silicon and aluminum hydroxides which contributed to decrease roughness and shear stress at the contact interface. This behavior enables the development of low energy loss water-based tribological systems using oxide ceramics. 13 2012 Elsevier B.V. All rights reserved. |
Identificador |
WEAR, LAUSANNE, v. 296, n. 1-2, pp. 656-659, AUG, 2012 0043-1648 http://www.producao.usp.br/handle/BDPI/34092 10.1016/j.wear.2012.07.030 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE SA LAUSANNE |
Relação |
WEAR |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE SA |
Palavras-Chave | #SLIDING FRICTION #SURFACE TOPOGRAPHY #ENGINEERING CERAMICS #PROFILOMETRY #SURFACE ANALYSIS #SLIDING SPEED #WEAR #SI3N4 #CERAMICS #CARBIDE #ENGINEERING, MECHANICAL #MATERIALS SCIENCE, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |