WEAR STUDIES AND CUTTING TESTS OFTi–Al–N–CNANOCOMPOSITE COATINGS IN MILLING OPERATIONS – TECHNICAL COMMUNICATION

Stueber, Michael; Ziebert, Carlos; Leiste, H.; Ulrich, S.; Sanz, C.; Fuentes, Elena; Etxarri, I.; Solay, M.; Garcia, Amauri; Barna, P.B.; Hovsepian, P.Eh.

doi:10.1080/10910340902782687

Cited by 9 publications

(4 citation statements)

References 26 publications

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“…reduce material transfer), thermal and chemical stability, as well as low friction (i.e. minimize frictional heating) (21)(22)(23)(24)(25) (26). Such materials include pure carbon coatings in the form of amorphous carbon (a-C), amorphous hydrogenated carbon (a-C:H), tetrahedral amorphous carbon (ta-C, and ta-C:H), all of which have shown to attain low friction and high wear resistance (27)(28)(29)(30)(31)(32)(33).…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties and friction behavior of magnetron-sputtered V-C coatings

Stoyanov

Schneider

Rinke

et al. 2017

Surface and Coatings Technology

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Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties and friction behavior of magnetron-sputtered V-C coatings

Stoyanov

Schneider

Rinke

et al. 2017

Surface and Coatings Technology

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“…Previous research on nanoscale multilayer structured TiAlCN/VCN coatings deposited by DCMS techniques employing HRTEM and STEM-EELS analyses have shown that the white phase is carbon, which accumulates at the interfaces of the individual nano layers during growth of the laminated structure as well as at the column boundaries [30]. Column boundary segregation has been also observed for single layer TiAlCN reported elsewhere [31]. The location of the narrow grey contrast band adjacent to the base layer corresponds to the zone two of the SEM cross section, see Figure 4a.…”

Section: Coating Structure Characterisation By Gaxrdmentioning

confidence: 66%

Structure evolution and properties of TiAlCN/VCN coatings deposited by reactive HIPIMS

Hovsepian

Ehiasarian

Petrov

2014

Surface and Coatings Technology

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Abstract:2.5 µm thick TiAlCN/VCN coatings were deposited by a reactive High Power Impulse Magnetron Sputtering (HIPIMS) process. Cross-sectional TEM showed gradual evolution of the structure of the coating with thickness. The initial structure is a nanoscale multilayer with sharp interlayer interfaces. This transforms to nanocomposite of TiAlCN and VCN nanocrystalline grains surrounded by a C-rich tissue phase and finally changes to an amorphous carbon rich Me-C phase. In contrast deposition in similar conditions using standard magnetron sputtering produces a well-defined nanoscale multilayer structure. Depth profiling by AES showed that the carbon content in the HIPIMS coating gradually increased from 25% at the coating substrate interface to 70% at the top thus supporting the TEM observations. Energy-resolved mass spectrometry revealed that HIPIMS plasma is a factor of 10 richer in C 1+ ions, and therefore more reactive, as compared to the plasma generated by standard magnetron discharge at the same conditions. The peculiar structure evolution in HIPIMS is discussed in relation to target poisoning effect and carbon outward diffusion during coating growth. 2Highly abrasive AlSi9Cu1 alloy was dry machined using TiAlCN/VCN coated 25 mm diameter end mills to investigate the coating-work piece material interaction. Green (532nm excitation) and ultraviolet (325 nm excitation) Raman spectroscopy was employed to identify the phase composition of the built up material on the cutting edge and chip (swarf) surfaces produced during machining. These analyses revealed formation of lubricious Magnèli phases namely V 2 O 5 and graphitic carbon as well as highly abrasive SiO 2 and mixed (AlSi)O thus shedding light on the wear processes and coating tribological behaviour during machining.

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“…The target-to-substrate distance was 5 cm. The thickness of the TiC/a-C thin films for the wear tests was adjusted to 5 microns [23,107,108].…”

Section: Thin Filmsmentioning

confidence: 99%

“…The TiC/a-C thin films exhibited a Vickers microhardness of 1634 HV 0.05 and showed a critical load of failure, L C1 , in scratch testing of 40 N. Their elemental composition was determined by electron probe micro-analysis (EPMA, Cameca Camebax system, CAMECA, Gennevilliers, France): 23.4 at.% Ti, 75.4 at.% C, 1.2 at.% contamination by Ar, O, N. These values correspond well with the composition of the compound target. Microstructural characterization by means of X-ray diffraction, transmission electron microscopy (crosssectional dark field imaging, selected area diffraction) and Raman spectroscopy revealed the coexistence of a nanocrystalline TiC phase with grain size in the range of 5 nm, homogeneously dispersed in an amorphous carbon matrix [23,107,108].…”

Section: Thin Filmsmentioning

confidence: 99%

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Schneider

Ulrich

Patscheider³

et al. 2022

Coatings

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Friction and wear performance of non-reactively magnetron-sputtered hydrogen-free TiC/a-C coatings were characterized under lubricated oscillating sliding conditions against 100Cr6 steel. The friction mediators, isooctane, ethanol and distilled water, were chosen to address the actual trend of environmentally friendly green technologies in mobility and the potential use of carbon-based nanocomposite thin film materials for tribocomponents in contact with gasoline and alternative biofuels. Sliding pairs of the TiC/a-C coatings showed significantly reduced friction and wear compared to the reference materials under both unlubricated and lubricated conditions (when using the aforementioned media isooctane, ethanol and distilled water). Quasi-stationary friction coefficient of the TiC/a-C sliding pairs after running-in was almost independent of test conditions and could be traced back to self-lubrication as a result of the formation of a transfer layer on the steel counter body. Wear of the coatings based on micro-abrasion and tribochemical reaction was significantly influenced by the environmental conditions. Lowest wear was measured after tests in non-polar isooctane whereas highest wear was measured after tests in water.

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WEAR STUDIES AND CUTTING TESTS OFTi–Al–N–CNANOCOMPOSITE COATINGS IN MILLING OPERATIONS – TECHNICAL COMMUNICATION

Cited by 9 publications

References 26 publications

Microstructure, mechanical properties and friction behavior of magnetron-sputtered V-C coatings

Microstructure, mechanical properties and friction behavior of magnetron-sputtered V-C coatings

Structure evolution and properties of TiAlCN/VCN coatings deposited by reactive HIPIMS

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

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