Raman Spectroscopy for Reliability Assessment of Multilayered AlCrN Coating in Tribo-Corrosive Conditions

Baronins, Janis; Antonov, Maksim; Bereznev, Sergei; Raadik, T.; Hussainova, Irina

doi:10.3390/coatings8070229

Cited by 16 publications

(7 citation statements)

References 24 publications

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“…The TiAlN coating with 3 µm thickness was prepared by the physical vapor deposition (PVD) method on the AISI 316L substrate at a temperature of 450 °C in a nitrogen atmosphere for 1 h and 850 V. The π-80 PVD unit was supplied by Platit (Swiss, Grenchen, Switzerland). The lateral rotating cathode arc (LARC) method was used ( Figure 8C) [32].…”

Section: Resultsmentioning

confidence: 99%

The Impact Resistance of Highly Densified Metal Alloys Manufactured from Gas-Atomized Pre-Alloyed Powders

2021

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With the increasing acceleration of three-dimensional (3D) printing (for example, powder bed fusion (PBF)) of metal alloys as an additive manufacturing process, a comprehensive characterization of 3D-printed materials and structures is inevitable. The purpose of this work was to test highly densified materials produced from gas-atomized pre-alloyed metallic powders, namely 316L, Ti6Al4V, AlSi10Mg, CuNi2SiCr, CoCr28Mo6, and Inconel718, under impact conditions. This was done to demonstrate the best possible performance of such materials. Optimized spark plasma sintering (SPS) parameters (pressure, temperature, heating rate, and holding time) are applied as a novel technique of powder metallurgy. The densification level, impact site (imprint) diameter and volume, and Vickers hardness were studied. The comparison of 316L stainless steel (1) sintered by the SPS process, (2) manufactured by PBF process, and (3) coated by the physical vapor deposition (PVD) process (thin layer of TiAlN) was successfully achieved.

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Section: Resultsmentioning

confidence: 99%

The Impact Resistance of Highly Densified Metal Alloys Manufactured from Gas-Atomized Pre-Alloyed Powders

2021

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“…The coating capacitance (Q coat ) value after 24 h exposure is the highest for TiCN (94), indicating a more homogeneous surface as compared to TiAlN coated specimen. The inhomogeneity of TiAlN coating contributes not only to the surface roughness and defects in the coating, but also to the presence of reactive Al and coating generated by the reaction products (e.g., AlOOH) [18]. The aqueous 3.5 wt.…”

Section: (7)mentioning

confidence: 99%

“…It is important to minimise the concentration of growth defects in order to improve the tribological properties of PVD hard coatings [17], [18]. PVD coating technology had intensive progress last decade, and it was successfully adapted even for protection of fine powder coatings.…”

Section: Introductionmentioning

confidence: 99%

Corrosion and Electrochemical Impedance Spectroscopy of Thin TiALN and TiCN PVD Coatings for Protection of Ballast Water Screen Filters

Kalnina

Priednieks

Lukins

et al. 2021

Latvian Journal of Physics and Technical Sciences

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The electrochemical impedance spectroscopy (EIS) and corrosion behaviour of physical vapour deposited (PVD) TiAlN and TiCN coatings of 50 µm mesh shaped AISI 316 stainless steel were estimated under simulated marine conditions (3.5 wt. % NaCl solution). The coatings were prepared by creating adhesive Cr-CrN interlayer with the thickness of about 0.3 µm. The obtained thicknesses of produced coatings were measured to be in a range between 2 and 3.5 µm. The presence of protective coatings leads to corrosion potential (Ecorr ) shifting to more positive values as compared to the bare stainless steel. This effect indicates higher protection efficiency of coated steel under marine conditions. The protective behaviour of produced coating leads to the decreased corrosion current density (jcorr ) by indicating up to 40-fold higher polarization resistance as compared to resistance of the naturally formed oxide layer over the stainless steel. The Nyquist and Bode plots were obtained with the help of EIS measurements by applying alternating potential amplitude of 10 mV on observed Ecorr . The obtained plots were fitted by appropriate equivalent circuits to calculate pore resistance, charge transfer resistance and capacitance. The present study reveals that pore resistance was the highest in the case of TiCN coating (Rpore =3.22 kΩ·cm2). The increase in duration of the immersion up to 24 h leads to change in the capacitive behaviour of the coatings caused by the penetration of the aqueous solution into pore system of TiCN coating with low wettability and surface passivation of reactive TiAlN coating. The presence of defects was confirmed by examining the obtained samples with the help of the scanning electron microscope.

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“…Nevertheless, those results are dependent on the substrate material and properties, the deposition method, the obtained chemical composition, the material of the tribo-partner element and the tribological test parameters [7,8,10,11]. Most of the investigations of TiAlN and CrAlN coatings are performed using cermets [12][13][14][15], Ti alloys [16][17][18], high speed steels [19][20][21] or stainless steels [22] as substrate material. Although the hot work tool steel AISI H11 is widely used in the metal forming industry, only a few studies have investigated the relation between the AISI H11 properties and their direct influence on the performance of the PVD coatings, and much less in ternary transition metal nitrides as TiAlN and CrAlN.…”

Section: Introductionmentioning

confidence: 99%

Tribomechanical Behaviour of TiAlN and CrAlN Coatings Deposited onto AISI H11 with Different Pre-Treatments

et al. 2019

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In the metalworking industry, different processes and applications require the utilisation of custom designed tools. The selection of the appropriated substrate material and its pre-treatment as well as the protective coating are of great importance in the performance and life time of forming tools, dies, punches and coated parts in general. TiAlN and CrAlN coatings have been deposited onto the hot work tool steel AISI H11 by means of Direct Current Magnetron Sputtering. Prior to the deposition, the steel substrate was modified by the implementation of three different pre-treatments: nitriding of the annealed substrate [Nitr.], heat treatment of the steel (quenching and double tempering) [HT] and nitridation subsequent to a heat treatment of the substrate [HT + Nitr.]. The purpose of this research is to obtain valuable information on the microstructural properties and tribomechanical behaviour of two of the most promising ternary transition metal nitride coatings, TiAlN and CrAlN, when deposited on the AISI H11 steel with different initial properties. The different pre-treatments performed to the steel prior to the deposition favour the tailoring during the design and construction of tools for specific applications. The microstructure, the adhesion and the wear resistance of TiAlN coatings were highly influenced by the substrate preparation. Contrarily, CrAlN results were more independent of the substrate preparation and no high influences were found. For instance, the adhesion of the TiAlN coating varied from 17 to 43 N for the coating deposited onto the HT + Nitr. substrate and the HT substrate respectively, while the lowest and highest adhesion of the CrAlN coating varied between 42 and 53 N for the HT and the HT + Nitr. respectively. Likewise, the wear coefficient of the CrAlN were ten times smaller than those found for the TiAlN coatings, presumably due to the presence of hex-AlN phases and the small differences on the Young´s Modulus of the substrate and the CrAlN coatings.

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Raman Spectroscopy for Reliability Assessment of Multilayered AlCrN Coating in Tribo-Corrosive Conditions

Cited by 16 publications

References 24 publications

The Impact Resistance of Highly Densified Metal Alloys Manufactured from Gas-Atomized Pre-Alloyed Powders

The Impact Resistance of Highly Densified Metal Alloys Manufactured from Gas-Atomized Pre-Alloyed Powders

Corrosion and Electrochemical Impedance Spectroscopy of Thin TiALN and TiCN PVD Coatings for Protection of Ballast Water Screen Filters

Tribomechanical Behaviour of TiAlN and CrAlN Coatings Deposited onto AISI H11 with Different Pre-Treatments

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