Investigation of the properties of Al1−xCrxN coatings prepared by cathodic arc evaporation

Reiter, Andreas; Derflinger, V.H.; Hanselmann, Barbara; Bachmann, T.; Sartory, Bernhard

doi:10.1016/j.surfcoat.2005.01.043

Cited by 359 publications

(262 citation statements)

References 4 publications

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“…In vacuum, the phase separation of AlTiN and AlCrN into c-TiN or c-CrN and c-AlN followed by h-AlN formation leads to hardness decreases [4,5]. In addition, in AlCrN and AlCrSiN, annealing involves nitrogen reduction to produce Cr 2 N above 1000 ºC [6,7]. Later the Cr 2 N is oxidized to Cr 2 O 3 , which is consistent with thermodynamic and kinetic studies [7].…”

Section: Introductionsupporting

confidence: 81%

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Effect of Silicon Addition on Microstructure and Mechanical Properties of Chromium and Titanium Based Coatings

Ardila-Téllez¹,

Sanchez

Téllez

2014

Fac. Ing.

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<p>The changes in the microstructure, mechanical properties and residual stresses of AlTiN, AlTiSiN, AlCrN and AlCrSiN coatings, has been studied before and after annealing at 900 ºC and 1100 ºC, using scanning and transmission electron microscopy, along with nano-indentation and X-ray diffraction techniques. The As-deposited coatings show a columnar structure, with a crystallite size between 18 nm and 28 nm. Despite the silicon addition, no effect on the crystallite size refinement was observed.<br />However, the addition of silicon increases hardness, elastic modulus and compressive residual stresses. After annealing at 900 ºC, the crystallite size growth and the residual stress relaxes; therefore, the coating hardness decreases. At 1100 ºC, the oxide layers formed in AlTiN and AlTiSiN, which act as protective layers enhancing oxidation resistance; meanwhile, a complete oxidation of AlCrN and AlCrSiN coatings take place. The Titanium based coatings present some superior mechanical properties and oxidation resistance than the chromium based coatings at 900 ºC and 1100 ºC.</p>

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Section: Introductionsupporting

confidence: 81%

“…In a previous study, the silicon addition produced an improvement of hardness, drilling and cutting performance, oxidation resistance [6] and thermal stability. Thus, coatings with a quaternary system (i.e.…”

Section: Introductionmentioning

confidence: 87%

Effect of Silicon Addition on Microstructure and Mechanical Properties of Chromium and Titanium Based Coatings

Ardila-Téllez¹,

Sanchez

Téllez

2014

Fac. Ing.

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“…As a consequence, the cutting forces during the routing process with coated tools will be lower than the ones with an unmodified tool. Low residual stresses (between −1.1 and −3.58 GPa) as obtained by Reiter et al [15] were determined, which promotes good adhesion of the CrAlN layers. In addition, these low values of residual stresses will enable us to deposit thick films.…”

Section: Coatings Deposition and Characterizationsmentioning

confidence: 55%

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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“…The grain boundary relaxation (GBR) model proposed by Hoffman [22] can account for the increase of residual stresses, which is due to crystallite sizes decrease. However, low residual stresses (between À1 and À3.6 GPa) as obtained by Reiter et al [23] were determined, which promotes good adhesion of the CrAlN layers. In addition, these low residual stresses will enable us to deposit thick films (between 1.8 and 3 mm), which reduces cracks produced by alternating and thermal stresses, and leads to good mechanical and tribological properties [6].…”

Section: Mechanical Properties Of Deposited Layersmentioning

confidence: 76%

Correlation between thermal properties and aluminum fractions in CrAlN layers deposited by PVD technique

Tlili

Nasri²,

Nouveau

et al. 2010

Vacuum

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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. The CrAlN coatings are a good alternative to conventional CrN coatings especially for high temperature oxidation-resistance applications. Different CrAlN coatings were deposited on silicon (100) by PVD (Physical vapor deposition) technique from two targets (chromium and aluminum) in a reactive nitrogen atmosphere at aluminum applied negative voltage (À300, À500, À700 and À900 V). The composition, structural, mechanical and thermal properties of the as-deposited coatings were systematically characterized by energy dispersive analysis of X-rays, X-ray diffraction, nanoindentation, and the ''Mirage effect'' experiments. The X-ray diffraction (XRD) data show that in general CrAlN coatings were crystallized in the cubic NaCl B1 structure, with the (1 1 1) and (2 0 0) diffraction peaks observed. Two-dimensional surface morphologies of CrAlN coatings were investigated by atomic force microscope (AFM). The results show that with increasing aluminum proportion the coatings became more compact and denser and their increased correspondingly, showing a maximum hardness of about 36 GPa (30 at% of Al) which is higher than that of CrN. Moreover, the results in this work demonstrate that the variation of aluminum fraction alter the resulting columnar grain morphology and porosity of the coatings. However, the thermal properties are greatly affected by these morphological alterations. The correlation between aluminum fraction in CrAlN coatings and its thermal properties revealed that the conductivity and the diffusivity are influenced primarily by size and shape distribution of the pores and secondarily by a decrease of the stitch parameter dimension.

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Investigation of the properties of Al1−xCrxN coatings prepared by cathodic arc evaporation

Cited by 359 publications

References 4 publications

Effect of Silicon Addition on Microstructure and Mechanical Properties of Chromium and Titanium Based Coatings

Effect of Silicon Addition on Microstructure and Mechanical Properties of Chromium and Titanium Based Coatings

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

Correlation between thermal properties and aluminum fractions in CrAlN layers deposited by PVD technique

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