Font Size: 

The manufacture of prosthetic implants by powder metallurgy allows the osto-integration of cells by promoting the presence of porosity, and thus, obtain new materials with better exploiting properties [1.2.3]. This work aims to study the effect of roughness on the wear rate of Cobalt-Chrome-Tungsten alloy-based biomaterials developed by powder metallurgy. After characterization of the samples by scanning electron microscopy (SEM), friction and wear tests with lubrication on the least porous series of samples were undertaken to determine their wear rates and friction coefficients according to their initial surface conditions. The analysis of the results obtained after sintering showed that porosity rates close to 4% were obtained, especially in alloys with high chemical heterogeneity. These results also showed that the evolution of the friction coefficient and the wear rate are dependent on several parameters such as hardness, surface topography and the third body