Cobalt-based alloys are widely used in biomedical applications. Various compositions of Co-Cr alloys were produced by powder metallurgy route. This study investigates the morphological aspect and electrochemical behavior of these Co-Cr alloys in comparison with a Fe-Cr-Co casting alloy. The application of this technique aims to have interesting mechanical properties, following the reduction of the elastic modulus in such a way to have a mechanical behavior similar to that of the bone, [1, 2, 3], and which allows a good distribution of the mechanical load between the two materials. Influence of Nickel and Tungsten has also been taken in consideration.

The Co-Cr-Ni powder was mixed and compacted in the form of pellets using uniaxial press and then sintered in a vacuum furnace. The dispersive energy X-ray spectroscopy (EDS) test is used for elemental analysis of each sample.

The obtained results showed that sample with Co₇₀Cr₂₀Ni₀W₁₀ composition presents the best densification and the best electrochemical behavior either in saline solution or in saline and glucosed solution.