Wear behavior of Cr1−xAlxN PVD-coatings in dry running conditions

Bobzin, Kirsten; Lugscheider, E.; Nickel, R.; Bagcivan, Nazlim; Krämer, A.

doi:10.1016/j.wear.2007.01.118

Cited by 72 publications

(45 citation statements)

References 8 publications

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“…[5] At this point, the ternary coating (Cr,Al)N is another promising candidate. Previous experimental investigations of (Cr,Al)N in both, lubricated contacts [36] and in dry running conditions [37] showed satisfying tribological results as well. Combining the mechanical properties and wear resistance of (Cr,Al)N with the lubricating effect of MoS 2 could promise a suitable solution for replacement of lubricants on highly forced tools in dry cold forging.…”

Section: Introductionsupporting

confidence: 53%

Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings

et al. 2015

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Cr 1Àx Al x )N/Mo y S z coatings promise a solution for replacement of lubricants on highly forced tools in dry cold forging. Wear resistant (Cr 1Àx Al x )N together with the self-lubricating Mo y S z deposited using PVD technology offers an extension of tool life without lubricants. This combination is insufficiently researched and its capabilities are yet unknown. In this contribution, (Cr 1Àx Al x )N/Mo y S z coatings are deposited by means of PVD in an industrial-scale unit. Decreasing the Cr and Al content by increasing Mo and S content, influences the coating properties considerably. It is found that hardness and indentation modulus decrease. However, an increase of the deposition rate is observed. A reduction of the friction coefficient with the increase of MoyS z content is detected.

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Section: Introductionsupporting

confidence: 53%

Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings

et al. 2015

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“…In fact with increasing of Al, the nose width value increases. According to Bobzin et al [16] this can be explained because the aluminium nitride films have a higher friction coefficient than the chromium nitride ones. So, it seems that the aluminium nitride content in CrAlN films increases with the Al content.…”

Section: Machining Of Mdfmentioning

confidence: 99%

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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“…Also, most of the tribotesting was carried out using Si 3 N 4 as a counterpart material in dry sliding conditions since it is stable throughout the desired test temperature range practically used in hybrid bearings of jet engines and other high temperature and space applications. It is important to note that the friction coefficient values of nitride on nitride surfaces reported in the literature were very high (friction coefficients in excess of 0.8 at RT) [28,29]. The CoF of nitride-based coatings at high temperature are also high (usually [0.5) [30] even against other counterfaces such as stainless steel or alumina [31].…”

Section: Introductionmentioning

confidence: 99%

“…The impetus for investigating this material stems from its superior mechanical properties (hardness reported to be in the [28][29][30][31][32][33][34] GPa range compared to [18][19][20][21][22][23][24] GPa for TiN and CrN) and the lubricating properties of its surface oxides (MO x ) at elevated temperatures ([300°C) which is due to the presence of lamellar structures (Magnéli phases) that shear easily during contact loading [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Mo2N/MoS2/Ag Tribological Nanocomposite Coatings for Aerospace Applications

et al. 2007

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Reactively sputtered Mo 2 N/MoS 2 /Ag nanocomposite coatings were deposited from three individual Mo, MoS 2 , and Ag targets in a nitrogen environment onto Si (111), 440C grade stainless steel, and inconel 600 substrates. The power to the Mo target was kept constant, while power to the MoS 2 and Ag targets was varied to obtain different coating compositions. The coatings consisted of Mo 2 N, with silver and/or sulfur additions of up to approximately 24 at%. Coating chemistry and crystal structure were evaluated using X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), which showed the presence of tetragonal Mo 2 N and cubic Ag phases. The MoS 2 phase was detected from XPS analysis and was likely present as an amorphous inclusion based on the absence of characteristic XRD peaks. The tribological properties of the coatings were investigated in dry sliding at room temperature against Si 3 N 4 , 440C stainless steel, and Al 2 O 3 . Tribological testing was also conducted at 350 and 600°C against Si 3 N 4 . The coatings and respective wear tracks were examined using scanning electron microscopy (SEM), optical microscopy, profilometry, energy dispersive X-ray spectroscopy (EDX), and microRaman spectroscopy. During room temperature tests, the coefficients of friction (CoF) were relatively high (0.5-1.0) for all coating compositions, and particularly high against Si 3 N 4 counterfaces. During high-temperature tests, the CoF of single-phase Mo 2 N coatings remained high, but much lower CoFs were observed for composite coatings with both Ag and S additions. CoF values were maintained as low as 0.1 over 10,000 cycles for samples with Ag content in excess of 16 at% and with sulfur content in the 5-14 at% range. The chemistry and phase analysis of coating contact surfaces showed temperature-adaptive behavior with the formation of metallic silver at 350°C and silver molybdate compounds at 600°C tests. These adaptive Mo 2 N/MoS 2 /Ag coatings exhibited wear rates that were two orders of magnitude lower compared to Mo 2 N and Mo 2 N/Ag coatings, hence providing a high potential for lubrication and wear prevention of hightemperature sliding contacts.

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Wear behavior of Cr1−xAlxN PVD-coatings in dry running conditions

Cited by 72 publications

References 8 publications

Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings

Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings

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

Adaptive Mo2N/MoS2/Ag Tribological Nanocomposite Coatings for Aerospace Applications

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Wear behavior of Cr1−xAlxN PVD-coatings in dry running conditions

Cited by 72 publications

References 8 publications

Influence of the Composition on the Properties of (Cr1–xAlx)N/MoySz PVD Coatings

Influence of the Composition on the Properties of (Cr1–xAlx)N/MoySz PVD Coatings

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

Adaptive Mo2N/MoS2/Ag Tribological Nanocomposite Coatings for Aerospace Applications

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Product

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Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings

Influence of the Composition on the Properties of (Cr_1–xAl_x)N/Mo_yS_z PVD Coatings