The aim of this research was to study the wear behavior of 42CrMo4 steel/ZrO2 composite with 10 and 30 ppi performed ceramic and compare it with the un-reinforced steel under different applied loads. The composite specimens were obtained by pressureless infiltration of the melt into a preformed ceramic of zirconium oxide. The effect of applied load on the specimens wear behavior was ...

polyvinyl ester green composites were synthesized with walnut shell powder (wsp) by in-situ polymerization technique. the green composites have been evaluated for mechanical properties such as tensile strength, tensile modulus and hardness. sliding wear loss, specific wear rate and coefficient of friction were investigated by using computerized pin-on–disc machine at normal applied loads of 20,...

Tribological research is the study of lubrication, friction, and wear. Tribology of biomaterials is to study how the materials work and fail. This will help us to produce better biomaterials. Tribology plays a very important role in improving the design and making successful biomaterials for medical purposes. Joints of human body, such as hip, knee, jaw, dental parts etc., all need to consider ...

The tribological understanding of friction and wear mechanisms and the generation of reliable friction and wear data are of increasing importance for the determination of reliability of machinery and availability of plants and transportation systems. To be of real value in reliability engineering, the tribological data should be expressed in terms of endurance life and probability of failure. T...

1. Rotational mobility of a widely used rotating platform total knee replacement. Iowa Orthop J, 2001. 21: p. 90. 2. Multi-contact-surface finite element model of a widely used rotating platform total knee. Polyethylene wear in meniscal knee replacement. A one to nine-year retrieval analysis of the Oxford knee.Unicompartmental "Lotus" knee prosthesis. Analysis of the results of a series of 142 ...

Failure of an acetabular cup is uncommon and has been attributed to wear or creep, trauma or bony irregularities in the acetabulum. We report ten cases in which fracture of the cup occurred at the site of drill holes used to anchor the marker wire. The role of such indentations as stress raisers has not been previously reported; we suggest that deep indentations or grooves should not be placed ...

Polymer matrix composites used in different industrial applications due to their enhanced mechanical properties and lightweight. However, these materials are subjected to friction and wear situations in some industrial and automobile applications. Therefore, there is a need to investigate the wear properties of polymer matrix composite materials. This article emphasizes the dry abrasive wear be...

The bearing couple of a polyethylene acetabular cup and a polished metal or ceramic femoral head has been a successful combination in hip arthroplasty for over 30 years, but it is now recognised that fine micron and submicron polyethylene wear particles can cause adverse cellular reactions which may lead to osteolysis and loosening. In prostheses showing high wear, the penetration of the femora...

Extensive osteolysis adjacent to orthopedic implants is often associated with wear particles of prosthetic material. The activation of the RANKL/RANK/OPG system is considered to be a likely cause of periprosthetic osteolysis leading to implant failure. The aim of this study was to examine the possible correlation between the clinical extent of osteolysis, the number of wear particles and expres...