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Tribology: Friction and Wear of Engineering Materials

01 Jan 1992-
TL;DR: In this paper, surface topography and surfaces in contact are discussed, as well as surface engineering in tribology, materials for bearings and sliding wear by hard particles, friction and friction.
Abstract: Preface * Introduction * Surface topography and surfaces in contact * Friction * Lubricants and lubrication * Sliding wear * Wear by hard particles * Wear and design * Surface engineering in tribology * Materials for bearings * Author index * Subject index.
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Journal ArticleDOI
TL;DR: In this article, the authors review the experimental evidence on turbulent flows over rough walls and discuss some ideas on how rough walls can be modeled without the detailed computation of the flow around the roughness element.
Abstract: ▪ AbstractWe review the experimental evidence on turbulent flows over rough walls. Two parameters are important: the roughness Reynolds number ks+, which measures the effect of the roughness on the buffer layer, and the ratio of the boundary layer thickness to the roughness height, which determines whether a logarithmic layer survives. The behavior of transitionally rough surfaces with low ks+ depends a lot on their geometry. Riblets and other drag-reducing cases belong to this regime. In flows with δ/k ≲ 50, the effect of the roughness extends across the boundary layer, and is also variable. There is little left of the original wall-flow dynamics in these flows, which can perhaps be better described as flows over obstacles. We also review the evidence for the phenomenon of d-roughness. The theoretical arguments are sound, but the experimental evidence is inconclusive. Finally, we discuss some ideas on how rough walls can be modeled without the detailed computation of the flow around the roughness element...

1,389 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a review of the mechanisms of action of the zinc dialkyldithophosphate (ZDDP) additive, concluding that we now know a great deal about the properties and morphology of ZDDP antiwear films, but still relatively little about the reaction pathways that lead to the formation or about the kinetics of ZDP film generation and removal.
Abstract: This paper reviews research into the mechanisms of action of the lubricating oil additive, zinc dialkyldithophosphate (ZDDP). The development of the use and research into ZDDP is first charted historically, starting with the additive's first introduction in engine oils in the late 1930s. Then our current state of knowledge of each of the main facets of ZDDP behaviour both in solution and at metal surfaces is identified and discussed. It is concluded that we now know a great deal about the properties and morphology of ZDDP antiwear films but still relatively little about the reaction pathways that lead to ZDDP film formation or about the kinetics of ZDDP film generation and removal.

835 citations


Cites background from "Tribology: Friction and Wear of Eng..."

  • ...The most generally accepted view of ZDDP antiwear action is that the reaction film acts simply as a mechanically protective barrier [133]....

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Journal ArticleDOI
TL;DR: In this article, the authors reviewed the behavior of polymers from the mid-20th century to the present day and determined the surface energy of different coatings with new contact adhesion meter.

633 citations

Book
01 Dec 1992
TL;DR: In this paper, the authors discuss base oils from petroleum and synthetic base fluids, and the role of additives in controlling friction, wear, and degradation of base oil based lubricants.
Abstract: Part I: Base Oils 1 Base oils from petroleum R.J. Prince 2 Synthetic base fluids M. Brown, J.D. Fotheringham, T.J. Hoyes, R.M. Mortier, S.T. Orszulik, S.J. Randles and P.M. Stroud Part II: Additives 3 Friction, wear and the role of additives in controlling them C.H. Bovington 4 Oxidative degradation and stabilisation of mineral oil based lubricants G. Aguilar, G. Mazzamaro and M. Rasberger 5 Viscosity index improvers and thickeners R.L. Stambaugh and B.G. Kinker 6 Miscellaneous additives and vegetable oils J. Crawford, A. Psaila and S.T. Orszulik 7 Detergents and Dispersants E.J. Seddon, C.L. Friend and J.P. Roski Part III: Applications 8 Industrial lubricants C. Kajdas, A. Karpinska, and A. Kulczycki 9 Formulation of Automotive Lubricants D. Atkinson, A.J. Brown and G. Lamb 10 Driveline Fundamentals and Lubrication I. Joseph 11Aviation Lubricants A.R. Lansdown and S. Lee 12 Liquid Lubricants for Spacecraft Applications S. Gill and A. Rowntree 13 Marine lubricants B.H. Carter and D. Green 14 Lubricating Grease G. Gow Part IV: Performance 15 Lubricants and their environmental impact C.I. Betton 16 Oil Analysis and Condition Monitoring A. Toms and L. Toms 17 Automotive Lubricant Specification and Testing M.F. Fox

621 citations

Journal ArticleDOI
TL;DR: In this article, the authors report the advances in the state of the art considering the relationships between the properties of functional surfaces, their applications and the technologies to engineer surfaces, and their applications in many advanced fields, such as: electronics, information technology, energy, optics, tribology, biology and biomimetics.

593 citations