TiAlN tribological coatings prepared in industrial deposition system with different rotations (original) (raw)
Related papers
High-temperature tribological characterization of commercial TiAlN coatings
Journal of Physics: Condensed Matter, 2006
This study was performed with the aim of evaluating the relative tribological behaviour at high temperature of (Ti 1−x Al x )N coatings commercially deposited on WC inserts. The (Ti 1−x Al x )N multilayered, nanostructured and single-layer coatings, which contained different Ti/Al atomic ratios varying from 7/3 to 2/3 respectively, were deposited by employing a commercial PVD cathodic arc process. The absolute hardness value for each coating is also reported and has been calculated from the Vickers microhardness measurements by using one of the models published in the literature. Standard ball-on-disc testing was conducted in order to determine friction coefficients and wear rates for these systems against a 6 mm alumina ball. These tests have been carried out in conditions that are not common in industrial use, e.g. metal cutting tools inasmuch as alumina is not a representative workpiece material. The sliding tests were performed out at 25, 500 and 700 • C with 5 N normal loads. At 25 • C, a wear volume, V , of approximately 10 −2 mm 3 was obtained for all the tested coatings. When the test temperature increased to 500 • C, the singlelayered coatings showed a wear volume of the same order of magnitude as those tested at room temperature. The multilayered coated samples decreased their wear volume by one order of magnitude, whereas the nanostructured samples showed almost no wear. At 700 • C, the wear volume values reported for all samples were similar and of the same order of magnitude as those tested at room temperature. The wear mechanism is discussed together with the morphological and compositional characteristics, determined by SEM coupled with EDX analysis.
InTech eBooks, 2018
The current topics related to the morphology and tribology of TiAlN monolayer, TiAlN/ SiNx, TiAlN/CNx and TiAlN/CNxAECNx nanoscale multilayer coatings and refer to our recent results on the evaluation of surface morphology, and nanoscale mechanical and tribological properties of coatings deposited on cemented carbide cutting tools and silicon wafer substrates by reactive magnetron sputtering deposition. The surface morphology and microstructure of the coatings were evaluated with an atomic force microscope in dynamic friction mode together with transmission electron microscope imaging. The tribological properties of the coatings were evaluated by pin-on-disc friction testing in dry air, and high-frequency linear-oscillation friction testing under various lubrication conditions. The tribological properties of the multilayer TiAlCrSiN and TiAlSiN coatings were compared with those of a single layer TiAlN coating to evaluate their possible applications to the surfaces of cutting tools. The machining performances of single layer TiAlN, multilayer TiAlSiN, and TiAlCrSiN coated drills were investigated in drilling of carbon steel.
Journal of the Korean Physical Society, 2017
With a view to improving the mechanical properties of coatings applied in the field of cutting tools and machine parts, the TiAlBN coatings were deposited by using direction-current (dc) magnetron sputtering with the various contents of nitrogen gas in an argon-nitrogen gas mixture. The structural characteristics of the coatings were determined by using X-ray diffraction, the friction coefficient, and the hardness and elastic modulus of the coatings were investigated by using a tribometer and nano-indentation. The surface morphologies and the roughnesses of the coatings were analyzed by using field emission scaning electron microscopy (FESEM) and atomic force microscopy (AFM). Additionally, the effects of nitrogen gas flow on the properties of the TiAlBN coatings were investigated. The structural characterization results revealed a typical face-centered cubic TiN structure with (111), (220), and (222) diffraction peaks. The strongest intensity in the (111) orientation was obtained for the coating prepared at a nitrogen gas flow of 4 sccm. For this kind of samples were obtained the highest values of the hardness and the stability, a low friction coefficient, and a smooth surface.
Tribological Behavior of TiAlNi , AlTiN , AlCrN Coatings Under Dry and Lubricated Conditions
2019
In this study, ~3.5 m thick multilayer TiAlN, AlTiN, and AlCrN coatings were deposited on the H13 steel surface by Cathodic Arc Physical Vapor Deposition (CAPVD) method. The tribological performance of the coatings were evaluated by a tribometer at dry and boundary lubrication conditions. Then, coating surfaces were investigated by optical microscope, optical profilometer and atomic force microscope (AFM) to evaluate the morphological changes, wear volumes and tribofilm thickness. Also, Scanning electron microscopy (SEM/EDX) and X-ray photoelectron spectrometry (XPS) analysis were applied to coating surfaces for the tribochemical evolution of the tribofilm. Results showed that AlCrN coating performed the best tribological behavior at dry and lubricated conditions, when compared to TiAlN and
Microstructure and tribological study of TiAlCN and TiTaCN coatings
Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu
The low coefficients of friction and wear rates of transition metal carbonitride make them excellent candidates for friction and wear applications. Coatings based on titanium carbonitride alloyed with Ta and Al were deposited using reactive magnetron sputtering on the surface of titanium VT1-0 and steel AISI 304. The effect of alloying titanium carbonitrides with Ta and Al and acetylene flow during deposition on the structure, composition, and tribological properties of the coating was studied. TiAlCN and TiTаCN coatings were deposited in various acetylene flows along with stable argon and nitrogen flows. Scanning electron microscopy, optical microscopy, X-ray phase analysis, and sliding wear test (ball-on-disk method) in two media were used to study the resulting coatings. The average coefficient of friction of the coating under friction without lubrication varied in the range of 0.13-0.85 and under friction with lubrication in the range of 0.0015-0.081. From the point of view of w...
Materials Science and Engineering: A, 1991
The results of tests on new multielement ceramic coatings based on (Ti,AI)N and Ti(B,N) deposited by plasma-assisted physical vapour deposition are reported. The work follows on from earlier studies based on standardized test procedures and now includes model cutting tests. The paper emphasizes the markedly different.tribological behaviour of these coatings depending on the contact conditions-even on different faces of the same tool. The need to further develop such coatings for specific contact conditions is therefore highlighted.
Coatings, 2019
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, w...
Vacuum, 1999
The dry sliding wear of monolayer TiAlCrN and multilayer TiAlN/CrN coatings has been investigated against a BM2 tool steel counterface. The coatings were deposited on a BM2 tool steel substrate by combined steered-arc/unbalanced-magnetron deposition. Increasing either contact load or sliding speed led to a reduction in friction coefficient, typically from 1.1 to 0.2. Increasing load resulted in an increase in wear rate for both TiAlCrN and TiAlN/CrN (e.g. from 7;10\ mm/m at 22 N to 4;10\ mm/m at 189 N for the TiAlCrN monolayer coating, and from 7;10\ mm/m at 22 N to 2.5;10\ mm/m at 189 N for TiAlN/CrN multilayer). The wear rate for all coatings was at least an order of magnitude lower than the uncoated BM2 steel. The wear rate of the TiAlCrN coating tended to decrease with an increase in sliding speed (from 7.4;10\ mm/m at 0.2 m/s to 1.3;10\ mm/m at 1.1m/s) while the wear rate of the TiAlN/CrN was approximately constant as a function of sliding speed (&1.5;10\ mm/m).
Tribological Behavior of TiAlN, AlTiN, and AlCrN Coatings at Boundary Lubricating Condition
Tribology Letters, 2018
In this study, ~ 3.5 µm thick multilayer titanium alumina nitride (TiAlN), alumina titanium nitride (AlTiN), and alumina chromium nitride (AlCrN) coatings were deposited on the H13 steel surface by cathodic arc physical vapor deposition (CAPVD) method. The tribological performance of the coatings was evaluated by a tribometer at boundary lubrication condition. Then, coating surfaces were observed by optical microscope, optical profilometer, and atomic force microscope to evaluate the morphological changes, wear volumes, and tribofilm thickness. Also, scanning electron microscopy (energy dispersive X-ray) and X-ray photoelectron spectrometry analyses were applied to coating surfaces for the tribochemical evolution of the tribofilm. Results showed that AlCrN coating performed the best tribological behavior at boundary lubricated condition, when compared to TiAlN and AlTiN coatings and it can be used as a wear resistant cam tappet coating in internal combustion engines.
Tribological Characterization of TiN Coatings Prepared by Sputtering
Procedia Technology, 2016
The aim of this paper is to study tribological properties of titanium nitride (TiN) coating deposited on various substrates by DC magnetron sputtering technique. The DC power of metallic titanium target was varied from 200 to 350 W at an increment of 50W. The effect of power variation on structure and surface morphology was characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The tribological properties of coating were investigated using pin on disk apparatus. TiN coating exhibited a higher wear resistance and low coefficient of friction compared to uncoated substrates of mild steel, aluminum and brass.