In this work, study of wear modes antifriction layers B83 babbitt during tribological tests was carried out. The assumed conditions for changing were determined testing with a continuous increase in load by analyzing data changes the coefficient friction and temperature near contact zone. obtained made it possible to conduct experiments deeper processes occurring results studies electron micros...

in manufacturing industry, it has been acknowledged that tool wear prediction has an important role in higher quality of products and acceptable efficiency. being an emerging area of research in recent years, drilling tool wear is an important factor which directly affects quality parameters of machined hole such as hole centring, roundness, burr formation and finished surface. in this paper, t...

Relative motion at interacting implant surfaces generates wear debris over time leading to periprosthetic osteolysis and device failure. Factors related to implant design, patient habitus and surgical approach will impact the generation of wear debris and influence the clinical longevity of artificial spinal disc devices. Further, surgeons play an important role in selecting the appropriate imp...

Introduction: Ultra high molecular weight polyethylene (UHMWPE) is a common bearing component in Total Knee Replacement (TKR) implants, and its susceptibility to wear continues to be the long-term limiting factor in the life of these implants. Novel material modifications have been introduced to reduce UHMWPE wear rates and thus improve the life of TKRs. Radiation and crosslinking of UHMWPE hav...

PURPOSE To determine whether intolerance to contact lens wear is attributable to clinical or protein characteristics of the tear film. METHODS Thirty-eight subjects participated; 20 were successful contact lens wearers and 18 had discontinued contact lens wear because of discomfort. Baseline tear film (no lens wear) was analyzed with a range of clinical measurements and protein analyses (lact...

To lower the friction coefficient and increase the wear resistance of epoxy, nanoparticles of zinc oxide and polytetrafluoroethylene (PTFE) were added in small volume percents to an epoxy matrix. Tribological testing of the samples in this study was completed on a linear reciprocating tribometer with a 250 N normal load and a 50.8 mm/s sliding speed. Several samples were made and tested followi...

Experimental and theoretical studies are made of a typical snap-action rocker switch, to establish the wear mechanisms in the pivoting contact. The rocker switch, used extensive~ in consumer goods, operates in the medium duty current range, (1 30 Amps). Highspeed photographic studies have shown that the main cause of wear is arcing, occurri~ during separation and bounce at the pivot contacts. T...