Mechanical and tribological properties of CNx films deposited by reactive magnetron sputtering

Tribocorrosion behavior and ions release of CoCrMo alloy coated with a TiAlVCN/CN multilayer in simulated body fluid plus bovine serum albumin

“…The XRD did not reveal the presence of extra peaks indicating that the multilayer has an amorphous structure, as it was expected for CNx, because of the low substrate temperature used during the deposition process [16]. The diffractogram obtained also confirms the results of previous research which suggests that crystalline TIAlCN/VCN multilayers and TiAlCN coatings become amorphous when the carbon content increases [43].…”

“…It has: a metal layer of TiAlV to promote adhesion of the multilayer, 9 layers of CNx alternating with 9 layers of TiAlVCN and finally a relatively thick CNx layer deposited on the top of the multilayer to reduce the coating COF [16]. Based on prior work by our group, the total thickness of the multilayer has been chosen to be from 3.0 to 3.5 µm [30].…”

“…Based on prior work by our group, the total thickness of the multilayer has been chosen to be from 3.0 to 3.5 µm [30]. [16,37]. The initial vacuum pressure was~3.9x10 -4 Pa (3x10 -6 Torr).…”

“…The displacements were continuously recorded during the indentations. The penetration displacement of the indenter at maximum load (ℎ ) and the final displacement (ℎ ), recorded in the unloading curve, were used to determine the percentage of elastic recovery % according to the equation 1 [16].…”

“…steel) [15]. But Broitman et al reported that CNx films deposited by reactive magnetron sputtering on metallic biomaterials exhibit good tribological properties and improved adhesion on metallic substrates [16][17][18]. Moreover the low coefficient of friction (COF) of CNx films has the potential to cause lower wear against polymeric materials such as ultra-high molecular weight polyethylene (UHMWPE) in human serum conditions [19].…”