Surface modification of 316L stainless steel with magnetron sputtered TiN/VN nanoscale multilayers for bio implant applications

Abstract

Nanoscale multilayered TiN/VN coatings were developed by reactive dc magnetron sputtering on 316L stainless steel substrates. The coatings showed a polycrystalline cubic structure with (111) preferential growth. XPS analysis indicated the presence of peaks corresponding to Ti2p, V2p, N1s, O1s, and C1s. Raman spectra exhibited the characteristic peaks in the acoustic range of 160-320 cm(-1) and in the optic range between 480 and 695 cm(-1). Columnar structure of the coatings was observed from TEM analysis. The number of adherent platelets on the surface of the TiN/VN multilayer, VN, TiN single layer coating exhibit fewer aggregation and pseudopodium than on substrates. The wear resistance of the multilayer coatings increases obviously as a result of their high hardness. Tafel plots in simulated bodily fluid showed lower corrosion rate for the TiN/VN nanoscale multilayer coatings compared to single layer and bare 316L SS substrate.

Biocompatibility evaluation of sputtered zirconium-based thin film metallic glass-coated steels

“…These values are lower than those for metallic implants with surface modification by hard ceramic coatings, but are comparable with the reported Young's modulus and hardness values of 120 GPa and 7.8 GPa, respectively, for sputtered hydroxyapatite coatings. 26,27 However, the measured values are higher than that reported for BMG which may be due to the difference in microstructure between the assputtered film and the bulk counterpart as well as the hardness calculation method. 28 electrochemical corrosion in simulated body fluid A number of important corrosion parameters for the bare (uncoated) samples and the samples coated with TFMG (1.5 μm and 3.0 μm in thickness) could be determined by measurement of potentiodynamic polarization in simulated body fluid, as shown in Figure 7.…”

Surface Morphology and Microhardness Behavior of 316l in Hap-Pmedm

“…As it is evident from the previous studies [26][27][28] that biomaterial surface must be porous and must possess bioactive compounds to portray the bioactivity within the individual, the machined samples were investigated for porous microstructure, powder deposition and formation of new compounds using SEM and XRD analysis respectively.…”

In vitro corrosion and biocompatibility screening of sputtered Ti40Cu36Pd14Zr10 thin film metallic glasses on steels

“…4. Metallic glasses usually have lower Young's modulus [41] in comparison with typical crystalline materials such that the stress shielding effect can be reduced for implant applications. In order to avoid the substrate effect on the measurement of the elastic modulus and nanohardness of the thin film, 160 nm deep indents were produced on the film as shown in Fig.…”