Surface interactions and tribochemistry in boundary lubrication of hypereutectic Al-Si alloys. Poster
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Research GroupGrupo de Ciencia de Materiales e Ingeniería Metalúrgica
Knowledge AreaCiencia de los Materiales e Ingeniería Metalúrgica
SponsorsWe thank MEC (Spain), EU FEDER (MAT2005-00067, MAT2008-01670) and Castrol Technology Center (UK).
PublisherUniversidad de Leeds
Bibliographic CitationJIMÉNEZ, A.E., MORINA, A., NEVILLE, A., BERMÚDEZ, M.D. Surface interactions and tribochemistry in boundary lubrication of hypereutectic Al-Si alloys. En: Leeds-Lyon Symposium on Tribology (35º: 2007: Leeds, UK). 35th Leeds-Lyon Symposium on Tribology. Trinity and All Saints College, The University of Leeds, UK Tuesday 9th – Friday 12th, September 2008: Duncan Dowson at 80. Leeds, UK: University of Leeds. 2008.
Al-Si alloys are characterized with 3.3.- miniSIMS DEPTH PROFILES a range of properties which make them potential materials to substitute cast iron in automotive engines. The formation of polyphosphate films on Al-Si alloys would indicate the potential use of ZDDP in lubrication of these alloys and hence facilitate their use as replacement materials for cast iron. It has been shown that the addition of MoDTC assists ZDDP to reduce friction and wear of hypereutectic Al-Si alloys. The aim of the current work is to fully characterize these two different kinds of tribofilms formed on the Al-Si alloy, showing the different surface interactions as a function of the presence of MoDTC in the tribofilm formation, as well as the different distribution and mechanical properties of the tribofilm.
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