Modeling of Nitrogen Penetration in Medical Grade CoCrMo Alloy during Plasma Nitriding

Tribocorrosion of Pulsed Plasma-Nitrided CoCrMo Implant Alloy

In the present study, a forged CoCrMo (ISO 5832-12) has been subjected to pulsed plasma treatment in a N2/H2 atmosphere at low temperatures (below 500 C). This treatment resulted in the formation of a layer composed by dispersed chromium nitride particles in a N-enriched metal matrix. The materials were tested for corrosion and tribocorrosion performance in 0.9 wt% NaCl at room temperature unde...

An Investigation of LENS®-Deposited Medical-Grade CoCrMo Alloys

A series of deposition experiments using CoCrMo were performed using an Optomec LENS® machine. An analysis of hardness, microstructure, and wear trends of the deposited alloys was undertaken in an attempt to determine the applicability of using LENS® to create better materials for orthopedic implants. It was found that LENS®-deposited CoCrMo alloys were harder than wrought materials, however in...

The E ect of Low Temperature Plasma Nitriding on Wear Resistance of Ti6Al4V Alloy

The e ect of low temperature plasma nitriding on wear resistance of Ti6Al4V alloy were investigated. There have been several studies to investigate the low temperature plasma nitriding on Ti6Al4V alloy. Plasma nitriding processes under gas mixture of N2/H2 = 3 were performed at temperature 535 ◦C for duration of 4, 8 and 12 h. Adhesive wear tests were carried out by using a tribometer in block-...

Albumin adsorption on CoCrMo alloy surfaces

Proteins can adsorb on the surface of artificial joints immediately after being implanted. Although research studying protein adsorption on medical material surfaces has been carried out, the mechanism of the proteins' adsorption which affects the corrosion behaviour of such materials still lacks in situ observation at the micro level. The adsorption of bovine serum albumin (BSA) on CoCrMo allo...

CoCrMo Alloy in vitro and in vivo studies