... 10 02 2012 Low friction polytetrafluoroethylene (PTFE) has been studied extensively and is widely used in tribological applications in bulk form. Tribological properties of thin film PTFE are less reported due to its poor wear resistance. Here, we show that by incorporating Au...

... 10 02 2012 A method of a microscopic wear estimation which does not require measurement of the original surface texture and that was developed by the author for Gaussian surfaces is extended here to the non-Gaussian two-process surfaces. wear surface texture honing material...

.... The wear caused on the bearing surface is modeled using Dufrane’s abrasive wear model. The Reynolds equation based on Constantinescu turbulent lubrication theory has been solved using FEM and Newton Raphson method along with the appropriate boundary conditions. The numerically simulated results have been...

... 26 03 2009 The friction and wear properties of nanocrystalline cobalt (nc Co) with a grain size of 20±5 nm and a hardness of 503±13 HV were studied using a pin-on-disc tribometer. Tests performed under unlubricated sliding conditions in ambient air showed that large tribolayer area...

... 09 01 2009 Scratches in the range of 1000 nm deep were produced on the surfaces of two polymers using diamond tip indenter to study the material deformation and wear debris generation characteristics. Our results show that the process of wear debris generation depends upon the manner...

..., dissolution of alloying constituents from the bronze bearing material dissolute into the synthetic ester lubricant occur leading to the formation of a copper enriched bearing surface layer. Tin-bronze with synthetic ester lubricant showed more stable friction values and roughly ten times better wear results...

... biotribology hip replacement UHMWPE lubricant wear In addition to confounding mass-based wear measurements in serum-lubricated hip simulator experiments, fluid absorption by the acetabular cups may simultaneously modify the wear resistance of the ultra-high molecular weight...

... 05 01 2009 Background: Multi-directional sliding motions between total knee replacement materials is a suspected primary wear mechanism of ultra-high molecular weight poly(ethylene) (UHMWPE). Method of Approach: A wear testing machine was developed to quantify damage from crossing...

.... This was attributed to the decrement of the shear stresses at the surface between the shaft and the fluid. It is also shown that the amplitude of the vibration signal when analyzed through wavelet theory is lower for the case with coating compared with the no coating. Triboadhesion bearings wear surface...

... have been carried out in a pin-on-disk tribometer, sliding against AISI 52100 steel pins. The wear performance of the nanocrystalline titanium, is shown to be superior than the microcrystalline material. Wear mechanisms are discused from SEM observation of wear tracks, wear debris morphology...

.... The shims with parallel line V-grooves showed the highest friction reduction (up to 35%) compared to production shims. There appears to be no significant difference in wear pattern on cam lobes tested against production shims and shims with parallel line V-grooves. Also, the wear rate of a shim...

... 07 10 2008 Lubricants bases for metalworking applications make extensive use of water-soluble additives to reduce friction and wear. In order to do such task, these additives must form a lubricating film that separates the contact surfaces, thus imparting good surface finishes...