A comparative study of reactive direct current magnetron sputtered CrAlN and CrN coatings

Barshilia, Harish C.; Selvakumar, N.; Deepthi, B.; Rajam, K.S.

doi:10.1016/j.surfcoat.2006.03.037

Cited by 295 publications

(158 citation statements)

References 37 publications

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“…The Al content contained in CrAlN films varies between 5 and 51 at.%. We can note that in the CrAlN deposited films, the hardness varies between 15 and 36 GPa which is more than the conventional Cr-N system [9] or the WC-Co substrate (16 GPa) [10]. Besides, a high Young modulus (which varies between 331 and 520 GPa) has been calculated (same results were obtained by Kim and Lee [11]), which is good for an application of these layers on WC-Co substrates which have a Young modulus of 640 GPa [12].…”

Section: Coatings Deposition and Characterizationsmentioning

confidence: 87%

Applications of CrAlN ternary system in wood machining of medium density fibreboard (MDF)

Benlatreche

Nouveau

Marchal

et al. 2009

Wear

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tNowadays, medium density fibreboard (MDF) composite wood is more and more used in the furniture industry to replace bulk wood such as oak, beech, etc. Indeed, this material presents good mechanical properties, is easy to machine, homogeneous, exists in different dimensions (thickness, etc.), is cheaper than bulk wood and finally can be covered by an adhesive decorative coat. Nevertheless, even if this material is homogeneous, it is abrasive enough to tend to the breakdown of the conventional carbide tools employed during its routing process. That is why it is necessary to improve the wear resistance of these tools. One solution is to protect them with a hard coating.The present study deals with the development of ternary CrAlN hard layers obtained by PVD method on carbide tools employed in second transformation of wood. CrAlN coatings have been optimized and then applied on carbide tools in routing of three types of MDF: standard, waterproof and fireproof. The aim of these wood machining tests was first to define the ability to be machined of the three kinds of MDF and second to compare the effectiveness of CrAlN coatings during the routing tests of these materials.

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Section: Coatings Deposition and Characterizationsmentioning

confidence: 87%

Applications of CrAlN ternary system in wood machining of medium density fibreboard (MDF)

Benlatreche

Nouveau

Marchal

et al. 2009

Wear

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“…In recent years, self-lubricating PVD tribological thin films have been intensively investigated [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Among these, PVD nanocomposite coatings containing soft metals (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, PVD nanocomposite coatings containing soft metals (e.g. Ag or Cu), as a solid lubrication phase, embedded in a hard wear-resistant matrix, such as a transition metal nitride [2][3][4][6][7][8][9], carbide [10,13] or oxide [14][15][16], and mixtures of these ceramics (in ternary/quaternary/nanocomposite coating systems), have all been extensively studied, with the promise of improved tribological performance during transient and/or cyclic temperature changes [17][18][19]. In particular, coatings based on Cr-Ag-N [7,8,[17][18][19][20][21] and Cr-Cu-N [6,22,23] (as two typical coating systems), have been studied.…”

Section: Introductionmentioning

confidence: 99%

CrCuAgN PVD nanocomposite coatings: Effects of annealing on coating morphology and nanostructure

Liu

Iamvasant

Liu

et al. 2017

Applied Surface Science

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CrCuAgN PVD nanocomposite coatings were produced using pulsed DC unbalanced magnetron sputtering. This investigation focuses on the effects of post-coat annealing on the surface morphology, phase composition and nanostructure of such coatings. In coatings with nitrogen contents up to 16 at.%, chromium exists as metallic Cr with N in supersaturated solid solution, even after 300 o C and 500 o C post-coat annealing.Annealing at 300 o C did not obviously change the phase composition of both nitrogen-free and nitrogen-containing coatings; however, 500 o C annealing resulted in significant transformation of the nitrogen-containing coatings. The formation of Ag aggregates relates to the (Cu+Ag)/Cr atomic ratio (threshold around 0.2), whereas the formation of Cu aggregates relates to the (Cu+Ag+N)/Cr atomic ratio (threshold around 0.5). The primary annealing-induced changes were reduced solubility of Cu, Ag and N in Cr, and the composition altering from a mixed ultra-fine nanocrystalline and partly amorphous phase constitution to a coarser, but still largely nanocrystalline structure. It was also found that, with sufficient Cu content (> 12 at.%), annealing at a moderately high temperature (e.g. 500 o C) leads to transportation of both Cu and Ag (even at relatively low concentrations of Ag, ≤ 3 at.%) from inside the coating to the coating surface, which resulted in significant reductions in friction coefficient, by over 50% compared to that of the substrate (from 0.31 to 0.14 with a hemispherical diamond indenter, and from 0.83 to 0.40 with an alumina ball counterface, respectively). Results indicate that the addition of both Cu and Ag (in appropriate *Manuscript Click here to view linked References 2 concentrations) to nitrogen-containing chromium is a viable strategy for the development of 'self-replenishing' silver-containing thin film architectures for temperature-dependent solid lubrication requirements or antimicrobial coating applications.

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“…Barshilia et al [28,29] prepared CrN hard coatings by unbalanced magnetron pulsed DC sputtering and noted that the film hardness is affected by several factors such as packing, residual stress, stoichiometry, preferred orientation and grain size. The same researcher studied the high temperature effect on the CrN and CrAlN coating deposited by the DC magnetron sputtering on the mild steel and silicon substrate and noted that at around 600 o C, the CrN coating got oxidised while in CrAlN, no detectable oxides were formed even at 800 o C. Polcar et al [30] applied CrN coatings on hardened steel substrates prepared by low arc deposition technologies and noted the strong dependency of the tribological parameters on temperature.…”

Section: Introductionmentioning

confidence: 99%

Structural and mechanical characterisation of the chromium nitride hard coating deposited on the silicon and glass substrate

Shah¹

2017

Int. J. Automot. Mech. Eng.

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Chromium Nitride (CrN) thin films are known for their comparatively good mechanical properties. CrN was deposited on Silicon (100) and glass substrates by using DC magnetron sputtering and the influence of the partial nitrogen content and different gaseous environment on their microstructural characteristics were investigated in the present work. The CrN films were characterised with X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM) and Nanoindentation was used to characterise the structural and mechanical properties of the deposited thin film. The films showed the [200] preferred orientation at lower (at 20%) nitrogen contents while the intensity of the peak [111] increases with the increase in the nitrogen content. The Cr2N (220) peak was identified at a nitrogen content above 30%, but for nitrogen content above 40%, the CrN phase was observed in both films deposited on Si(100) and glass substrates. The preferred orientations of the CrN thin films are strongly influenced by the nitrogen content inside the chamber as observed in the present work. The surface roughness and deposition rate were observed in a reducing trend with the increasing N2 content and temperature from 20.31 to 2.71nm and from 30.16 nm/min to 25.66nm/min, respectively. The hardness and modulus of pure N2 films deposited on the Si substrates were evaluated by nanoindentaion testing and indicated 31 GPa and 250 GPa, respectively.

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A comparative study of reactive direct current magnetron sputtered CrAlN and CrN coatings

Cited by 295 publications

References 37 publications

Applications of CrAlN ternary system in wood machining of medium density fibreboard (MDF)

Applications of CrAlN ternary system in wood machining of medium density fibreboard (MDF)

CrCuAgN PVD nanocomposite coatings: Effects of annealing on coating morphology and nanostructure

Structural and mechanical characterisation of the chromium nitride hard coating deposited on the silicon and glass substrate

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