Comparison of Structural and Electrochemical Properties among TiCN, BCN, and CrAlN Coatings under Aggressive Environments

Relationship of the structural, mechanical, and tribological behaviors among TiCN, BCN, and CrAlN coatings in the fatigue life of AISI 1045 steel for automotive industry

“…5a, it can be concluded that all the deformations in the coatings were positive, producing tensile type stresses; a larger deformation was present in the TiCN coating, while a smaller lattice deformation was exhibited by the BCN coating. This agrees with the small shifts of peaks ( 111) and (200) to lower 2θ angles [5,22]. Similarly, Fig.…”

“…4b, it can be observed that the TiCN coating has the lowest value, while the BCN coating has the highest value of lateral crystallite size; it can be established that TiCN presents greater obstacles for free crystallite growth compared to CrAlN and BCN. Previous studies determine mechanical and morphological properties of monolayers and multilayers that support these results for TiCN and CrAlN [7,19,20,23,22].…”

“…5a presents the lattice deformation as a function of the coating material; Eq. 2 was used to determine this lattice deformation [24,22].…”

Corrosion resistance of NbN and NbxAlyN coatings on stainless steel

“…From Figure 7, it is noticeable the presence of surface flaws leading to pitting corrosion in all studied samples. Equation ( 1) has been used in the literature to calculate porosity (P) in ceramic coatings [12,33,34]: where R p,s is the polarization resistance of the substrate (Ω cm 2 ), R p is the polarization resistance of the coated system (Ω cm 2 ), ΔE corr is the difference in corrosion potential between the uncoated and the coated system (mV) and β a is the Tafel anodic coefficient of the uncoated substrate (mV decade −1 The microstructure of nitride coatings has a great influence on corrosion resistance. NbN coatings present characteristic columnar microstructures that provide diffusion channels for electrolyte penetration [35].…”

“…Equation (1) has been used in the literature to calculate porosity ( P ) in ceramic coatings [12, 33, 34]: where R p,s is the polarization resistance of the substrate (Ω cm 2 ), R p is the polarization resistance of the coated system (Ω cm 2 ), ΔE corr is the difference in corrosion potential between the uncoated and the coated system (mV) and β a is the Tafel anodic coefficient of the uncoated substrate (mV decade −1 ). R p,s (2.01 × 10 5 Ω cm 2 ) and E corr_subastrate (−281.35 mV), β a (167.64 mV decade −1 ) were calculated using Tafel analysis.…”