Despite the fact that self-organization during friction has received relatively little attention from tribologists so far, it has the potential for the creation of self-healing and self-lubricating materials, which are important for green or environment-friendly tribology. The principles of the thermodynamics of irreversible processes and of the nonlinear theory of dynamical systems are used to...

Abstract This paper is aimed at the problems of abnormal tribological damage and fluctuation performance in self-lubricating composite serving heavy load spherical plain bearing aerospace field. The Nomex/PTFE fiber reinforced was used to carry out a reciprocating block on ring test, investigating material its wear evolution. Results show that influence oscillating frequency obviously higher th...

Inspired by suggestions of C(60) "nanobearings," we have measured sliding friction on fixed and rotating C(60) layers to explore whether a lubricating effect is present. We refer to this general phenomenon as "nanomapping," whereby macroscopic attributes are mapped in a one on one fashion to nanoscale entities. Our measurements are the first to directly link friction to a documented molecular r...

The effects of viscous dissipation and thermal dispersion due to the presence of ultraŽ ne particles in the lubricating  uid are studied on  ow and heat transfer inside a nonisothermal and incompressible bearing during relief and squeezing stages. The governing equations are nondimensionlized and reduced to simpler forms based on an order-ofmagnitude analysis. Analytical solution for the ener...

Seventy to eighty five percent of failures and wear problems in lubricated machines are caused by oil contamination. Contaminants shorten the life of all machines, especially those with fine finishes and clearances operating at high speeds and temperatures. Examples are rolling and sliding bearings, gears, vane and piston hydraulic pumps, Maintaining clean oil provides the benefits listed in Ta...

Thermally activated self-lubricating nanolayer coating for cutting tool applications Robin Abraham Koshy The different nitride phases of Cr and Mo were studied as possible candidates in a bi-layered system that would constitute a thermally activated self lubrication coatings for dry cutting applications. The intent was to deposit multilayer films of CrN and Mo2N, where the Mo2N forms a sacrific...

It is well understood that proper joint kinematics and loading are important factors in maintaining the health of the articular cartilage of the knee. This state of normal, physiologic loading facilitates a balance between anabolic and catabolic processes resulting in low level, homeostatic cartilage matrix turn-over and remodeling. In this way articular cartilage can function throughout an ent...