Design and evaluation of tribological coatings

Hogmark, Sture; Jacobson, Staffan; Larsson, Mats

doi:10.1016/s0043-1648(00)00505-6

Cited by 358 publications

(170 citation statements)

References 57 publications

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“…This combination of properties is referred to as toughness, a measure of the resistance of a material to crack formation. Several thin-film toughening approaches have been developed, including the incorporation of ductile phases, [11][12][13] multilayer structures, 14,15 compressive stresses, 16,17 phase transformations, 18,19 and carbon-nanotubes. [20][21][22] However, these approaches, which are based on methods applied to bulk materials, raise significant problems in coatings.…”

mentioning

confidence: 99%

Toughness enhancement in hard ceramic thin films by alloy design

Kindlund¹,

Sangiovanni²,

et al. 2013

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Hardness is an essential property for a wide range of applications. However, hardness alone, typically accompanied by brittleness, is not sufficient to prevent failure in ceramic films exposed to high stresses. Using VN as a model system, we demonstrate with experiment and density functional theory (DFT) that refractory VMoN alloys exhibit not only enhanced hardness, but dramatically increased ductility. V0.5Mo0.5N hardness is 25% higher than that of VN. In addition, while nanoindented VN, as well as TiN reference samples, suffer from severe cracking typical of brittle ceramics, V0.5Mo0.5N films do not crack. Instead, they exhibit material pile-up around nanoindents, characteristic of plastic flow in ductile materials. Moreover, the wear resistance of V0.5Mo0.5N is considerably higher than that of VN. DFT results show that tuning the occupancy of d–t2g metallic bonding states in VMoN facilitates dislocation glide, and hence enhances toughness, via the formation of stronger metal/metal bonds along the slip direction and weaker metal/N bonds across the slip plane

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confidence: 99%

Toughness enhancement in hard ceramic thin films by alloy design

Kindlund¹,

Sangiovanni²,

et al. 2013

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“…Currently, thin hard physical vapor deposition (PVD) coatings are widely used to improve the tribological performance of forming tools, cutting tools, and machine elements [1]. In these applications, the surface morphology and tribology of the coated part are the most important factors influencing the tool and equipment performance [2].…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology and Tribological Properties of Nanoscale (Ti, Al, Si, C)N Multilayer Coatings Deposited by Reactive Magnetron Sputtering

Wang¹,

Miyake²

2018

Lubrication - Tribology, Lubricants and Additives

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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.

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“…This paper describes a method to investigate the pulse shape characteristics to identify critical points for pulse shape design. Two different techniques were used namely, reflected pulse analysis and digital holography, to identify the ablation characteristics with ns pulses of different durations on TiN ceramic coating, a highly interesting material for mechanical [27], electronical [28], and biomedical [29] applications. For a better comprehension of the pulse characteristics, single pulse ablation conditions were tested, since it generates the simplest block for more complex micromachining processes based on multiple pulses.…”

Section: Introductionmentioning

confidence: 99%

Investigation of pulse shape characteristics on the laser ablation dynamics of TiN coatings in the ns regime

Demir¹,

Pangovski²,

O’Neill³

et al. 2015

J. Phys. D: Appl. Phys.

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In this work, the ablation dynamics of TiN coating with a ns-pulsed fibre laser in a wide range of pulse durations were studied. Critical time instances within the pulse duration were assessed by reflected pulse analysis. Digital holography was employed to investigate the shock wave expansion dynamics within and beyond the pulse duration. The results depict that the absorption behaviour changes as a function of the pulse rise time. Moreover, planar expansion of the shock wave is observed, which is generally linked to higher machining quality and absence of excessive plasma. The results of the study are interpreted to depict the required characteristics of optimized pulse shapes in ns-region for improved micromachining performance.

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Design and evaluation of tribological coatings

Cited by 358 publications

References 57 publications

Toughness enhancement in hard ceramic thin films by alloy design

Toughness enhancement in hard ceramic thin films by alloy design

Surface Morphology and Tribological Properties of Nanoscale (Ti, Al, Si, C)N Multilayer Coatings Deposited by Reactive Magnetron Sputtering

Investigation of pulse shape characteristics on the laser ablation dynamics of TiN coatings in the ns regime

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