Diagnostic of corrosion–erosion evolution for [Hf-Nitrides/V-Nitrides] n  structures

Escobar, C.; Villarreal, M.; Caicedo, J.C.; Aperador, W.; Caicedo, H. H.

doi:10.1016/j.tsf.2013.07.081

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…9a. In addition, the coating with 50 bilayers presented an increase in the resistance to corrosion, as corroborated in the electrochemical properties obtained in this investigation, since this surface had a smaller amount of imperfections, roughness or a less irregular morphology which decreased the passage of the electrolyte to the substrate-coating interface [16], useful when incorporating liquid lubricants in the cutting processes for in the tools for which this coating is designed for. Figure 5b shows the grain size versus the number of bilayers for the monolayer and multilayer coatings, where it could be seen that the grain size decreases as the number of bilayers increases due to nucleation effects, since the growth of the grains are interrupted when a new monolayer starts to be deposited and consequently, when many more layers are deposited, smaller grains start to form causing the microstructure to become more compact, much denser and giving rise to a lower roughness, as it is the case of the coating with the highest number of bilayers, as corroborated in Fig.…”

Section: Surface Analysissupporting

confidence: 79%

“…5, where it was observed that by increasing the number of bilayers the corrosion current presented a decrease due to the fact that increasing the number of interfaces promotes a greater amount of barrier to the passage of electrolyte to the substrate. Thus, making a direct attack of the chlorine ion Cl-on the surface difficult [16,21], therefore, the system with 50 bilayers had a lower corrosion current compared to the other systems.…”

Section: Electrochemical Properties: Electrochemical Impedance (Eis)mentioning

confidence: 99%

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Influence of the Number of Bilayers on the Mechanical and Tribological Properties in [TiN/TiCrN]n Multilayer Coatings Deposited by Magnetron Sputtering

Ortiz¹,

Colorado²,

Aperador³

et al. 2019

Tribol. Ind.

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In this work the influence of the number of bilayers was studied on the mechanical, tribological and electrochemical properties of multilayer coatings [TiN / TiCrN]n as a function of the number of bilayers n = 1, 25 and 50, deposited by magnetron sputtering. By Xray diffraction (XRD), a cubic crystal structure centered on the faces (FCC) was determined for all coatings and an increase in the compressive stresses that were generated during the deposition process was found by perfilometry; Atomic force microscopy (AFM) determined that by increasing the number of bilayers, the roughness decreased, due to an increase in the density of the system. By nanoindentation it was found that the hardness (H) and the modulus of elasticity (E) increased as the number of bilayers did. By Pin on disk a decrease in the coefficient of friction was observed as the number of bilayers was increased, which was related to the increase in hardness and the reduction of roughness. The results of EIS and Tafel for the electrochemical properties, determined that the corrosion rate decreased due to the fact that a greater barrier to the passage of the electrolyte towards the substrate is promoted when the number of bilayers increases.

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Section: Surface Analysissupporting

confidence: 79%

Section: Electrochemical Properties: Electrochemical Impedance (Eis)mentioning

confidence: 99%

Influence of the Number of Bilayers on the Mechanical and Tribological Properties in [TiN/TiCrN]n Multilayer Coatings Deposited by Magnetron Sputtering

Ortiz¹,

Colorado²,

Aperador³

et al. 2019

Tribol. Ind.

Self Cite

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“…On the other hand, the Al(2s) and C(1s) peaks located at 121.09 eV and 254.5 eV can be credited to previous contamination of the sample or test chamber. From these results it was determined that the N/Si and O/Al ratios obtained with these parameters were 1.32 and 1.77 respectively, close to the ideal 1.33 and 1.55 ratios [14,17].…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 59%

“…This material is commonly used on surface that are exposed to frictional wear and erosion by solid particles, as well as surfaces exposed to high temperatures [13]. However, literature has shown that there is substantial improvements when multilayer systems are developed instead of conventional single layer system such as [HfV/VN]n [14], [TiN/ZrN]n [15], [TiN/TiAlN]n [16], among other multilayers [17][18][19][20], bringing together the best characteristics of multiple layers. One example of these characteristics their multilayer structure, which by presenting symmetry breaks between each layer, a resistance to crack propagation is generated, increasing the mechanical and tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Properties Evolution of [Si3N4/Al2O3]n Multilayer Coatings

Ortiz¹,

Hernández‐Rengifo²,

Guerrero³

et al. 2021

Tribol. Ind.

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Multilayer coatings [Si3N4/Al2O3]n have generated great interest due to their intriguing properties which have made them a potential candidate to be implemented in different processes within the food and pharmaceutical industries. Unfortunately, this multilayer system based on [Si3N4/Al2O3]n does not have strong tribological studies that could express in an emphatic way its own tribological characteristics. For this reason, the aim of this research consisted of a detailed study of the evolution of the mechanical and tribological properties of the [Si3N4/Al2O3]n coatings as a function of the bilayer number n=1, 10, 30 and 70, with special emphasis on the tribological analysis in a dry and lubricated environment. It was determined that the mechanical properties such as the hardness and the elastic modulus increased by 29% and 6.3%, while the friction coefficient in a dry and lubricated environment decreased by 33% and 81.8%, respectively, when increasing the bilayers from n=1 to n=70. Thus, the present study determined that the coating [Si3N4/Al2O3]70 presented ideal properties that make it a promising candidate to be implemented as a protective coating on processing devices within the food and pharmaceutical industry.

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“…For this second zone of analysis it is necessary to note that although the Ra value increases to the maximum value measured for the two trials, the coated tool continues to show a better surface finish, with a roughness value of Ra 1120 nm compared to a roughness value of 1696.2 nm for the uncoated tool, demonstrating the efficiency of the coating. Moreover, Figure 35a reveals an uneven surface, with pronounced peaks and large surface defects, while Figure 35b shows a more homogeneous surface [33]. This all indicates that applying a monolayer coating of HfN to the cutting tool improves the surface finish of the workpiece.…”

Section: Afm Analysismentioning

confidence: 89%

Machining With Cutting Tool Coated With Monolayer Of HfN

2016

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In this study, AISI 1020 steel was machined by chip removal, in dry conditions, using ASSAB 17 tool bits with Hafnium Nitride (HfN) monolayer coating, deposited as a thin film via magnetron sputtering physical vapor deposition (PVD) technique, and uncoated tool bits, used as reference system. The surfaces of the machined steel were evaluated and characterized using Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). The use of monolayer HfN coating on the tool bits was demonstrated to improve the surface finish of the workpiece and reduce cutting process time and cost.Keywords: Monolayer, Surface roughness, Machining, Cutting Tools, Hafnium Nitride. ResumenEn este trabajo, se realizó el mecanizado por arranque de viruta del acero AISI 1020, en condiciones de ausencia de lubricación; utilizando buriles de acero rápido ASSAB 17, con recubrimiento monocapa de Nitruro de Hafnio (HfN) depositados como película delgada, mediante la técnica de deposición física en fase vapor (PVD) magnetrón sputtering y con buriles sin recubrir, usados como sistemas de referencias. Posteriormente se evaluaron las superficies obtenidas en el acero mecanizado, caracterizándolas mediante microscopia de fuerza atómica (MFA) y microscopia electrónica de barrido (MEB). Se evidencio que el uso de recubrimientos monocapa de HfN sobre los buriles de acero rápido, mejoran el acabado superficial del material mecanizado, reduciendo los tiempos y costos del proceso de corte.

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Diagnostic of corrosion–erosion evolution for [Hf-Nitrides/V-Nitrides] n structures

Cited by 11 publications

References 23 publications

Influence of the Number of Bilayers on the Mechanical and Tribological Properties in [TiN/TiCrN]n Multilayer Coatings Deposited by Magnetron Sputtering

Influence of the Number of Bilayers on the Mechanical and Tribological Properties in [TiN/TiCrN]n Multilayer Coatings Deposited by Magnetron Sputtering

Mechanical and Tribological Properties Evolution of [Si3N4/Al2O3]n Multilayer Coatings

Machining With Cutting Tool Coated With Monolayer Of HfN

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