Properties of coatings based on Cr, Ti, and Mo nitrides with embedded metals deposited on cutting tools

Kuleshov, A.K.; Углов, В.В.; Chayevski, V. V.; Анищик, В. М.

doi:10.3103/s106836661103007x

Cited by 12 publications

(10 citation statements)

References 7 publications

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“…For the further characterisation of mechanical and, thus, protective properties the ratio of hardness and Young's modulus is introduced in the form of H/E parameter [11,20,42,52,[59][60][61][62]. In Fig.…”

Section: Physical and Mechanical Propertiesmentioning

confidence: 99%

“…It allows to improve significantly the protective properties of deposited coatings. On the other hand, the design of multilayer coatings with different composition of bilayers (soft and solid phases) allows to reduce internal stresses and brittleness while high values of hardness from 30 to 45 GPa are maintained [18][19][20][21][22][23][24][25][26][27][28]. One of the promising multilayer systems is the combination of chromium and molybdenum nitrides [29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Superhard CrN/MoN coatings with multilayer architecture

et al. 2018

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The main regularities of the formation of microstructure and properties of multilayer nanostructured CrN/MoN films with periodically changing architecture of layers were considered. The transition metal nitride coatings with high hardness and wear resistance were obtained by vacuum-arc evaporation of the cathodes (Arc-PVD) in nitrogen atmosphere at several sets of predetermined deposition parameters. CrN/MoN multilayers were fabricated using constant nitrogen pressure of 0.4, 0.09 and 0.03 Pa. All samples were divided into three main series depending on the values of bias voltage applied to the substrates (-20,-150 and-300 V). Each serial of samples contain multilayer films varying in the individual layer deposition time and, hence, thickness, which is in range from 1.7 µm to 20 nm. The morphology of surface and microstructure of cross-sections were studied by scanning electron microscopy (SEM). Elemental composition and elemental depth profiles were characterised by energy-dispersive X-ray spectroscopy (EDS), secondary-ion mass spectrometry (SIMS), Rutherford backscattering spectrometry (RBS) and high-resolution transmission electron microscopy (HRTEM) EDS. Micro-and nanostructural analysis of the films was performed by X-ray diffractometry (XRD), grazing incidence XRD (GIXRD), in-plane XRD, electron backscatter diffraction (EBSD) and HRTEM selected area electron diffraction (SAED). The main phases formed in films were two CrN and γ-Mo 2 N nitride phases with cubic lattice of NaCl type and not significant volume of additional metastable MoN cubic phase depending on nitrogen pressure and bias voltage. The preferential orientation of planes changes from [311] to [111] and [200] with the increase of absolute value of bias voltage from-20 V to-150 V and-300 V respectively. The size of nanograins in coatings with a nanometre bilayers thickness was about 12 nm, while micro-deformation of nanocrystallites was about 0.5-0.6%. Coatings with thin nanoscale bilayers have shown high hardness (38-42 GPa) and strong wear resistance, which makes them appropriate and promising for industrial applications as protective ones. The relations between deposition conditions and obtained composition, structure and features were studied. The best parameters and deposition conditions were discussed as recommended to achieve superior mechanical and physical properties of coatings with long lifetime and applicable for harsh environment.

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Section: Physical and Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superhard CrN/MoN coatings with multilayer architecture

et al. 2018

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“…It should also be noted that the hardness and heat resistance of the (Ti,Zr)N coating are significantly higher than those of TiN or ZrN [43,46,47]. The (Ti,Mo)N and (Ti,Cr)N coatings have been studied in [48][49][50][51][52]. In particular, in [48,49], the studies have revealed that the phase of fcc-TiN with Mo dissolved in it dominates in the (Ti,Mo)N coating.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Microdroplets on the Coatings Nanolayer Structure

Grigoriev

Vereschaka²,

Milovich

et al. 2020

Coatings

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The paper presents the results of studies focused on the specific features typical for the formation of the shape and structure of microdroplets embedded into the structure of the Ti–TiN–(Ti,Cr,Mo,Al)N and Ti–TiN–(Ti,Al,Nb,Zr)N coatings during their deposition. Three main microdroplet shapes—a sphere, a tear, and a lens—have been considered. The specific features typical for the formation of secondary layered structures on the surface of some microdroplets have also been examined. As a result of the conducted investigations, with the use of scanning and transmission electron microscopy, the influence of microdroplets on the distortion of the nanolayer structure of the coatings was studied. A hypothesis has been proposed concerning a relationship between the microdroplet shape and the presence or absence of secondary structures and the microdroplet sizes and weight, as well as the conditions in the unit chamber during the movement of a microdroplet from a cathode to the deposition surface. Based on the study focused on the shape of the microdroplet core and the specific features typical for the formation of the secondary structure around it, a hypothesis has been proposed, according to which, for some microdroplets, it takes much more time than previously assumed for the movement from a cathode to the deposition surface.

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“…It is known that effective hardening is can be used to produce hard alloy tools with nitride coatings by condensing metals via the ion bombardment of metallic ion flow in nitrogen gas [8][9][10][11]. There are a few studies on applying nitride coatings produced by ion bombard ment in order to promote the wear resistance of wood cutting tools.…”

Section: Introductionmentioning

confidence: 99%

“…Certain deposition conditions of coatings with ion bombardment that use arc burning from hard alloy molybdenum and composite coatings can be obtained that contain both nitride and a signif icant portion of metallic phase. Unlike singe phase nitride coatings, this deposition yields a low coeffi cient of friction for the composite Mo + Mo 2 N coat ing in dry medium [11]. On the other hand, the decrease of dry friction during the wear of knives when machining laminated boards is achieved by sulfacya nization, as shown in [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of ZrN and Mo-N coatings and sulfacyanization on wear of wood-cutting knives

et al. 2014

Self Cite

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The effect of sulfacyanization of ZrN and Mo+Mo 2 N coatings on the volume wear of hard alloy blade cutting knives when milling chipboard laminated wood was investigated. It is revealed that this treat ment reduces the volume wear of knife blades two times. Nitride coatings promote the hardness and defor mation resistance of blades. Sulfacyanization forms surface film containing C, S, and N. This film is deeply deformed through the edges and pores of carbide grains reducing friction and oxidation of blades in cutting.

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Properties of coatings based on Cr, Ti, and Mo nitrides with embedded metals deposited on cutting tools

Cited by 12 publications

References 7 publications

Superhard CrN/MoN coatings with multilayer architecture

Superhard CrN/MoN coatings with multilayer architecture

Investigation of the Influence of Microdroplets on the Coatings Nanolayer Structure

Effect of ZrN and Mo-N coatings and sulfacyanization on wear of wood-cutting knives

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