Structure and properties of selected (Cr–Al–N, TiC–C, Cr–B–N) nanostructured tribological coatings

Lin, Jinn; Moore, John J.; Moerbe, William C.; Pinkas, Malki; Mishra, Brajendra; Doll, Gary L.; Sproul, William D.

doi:10.1016/j.ijrmhm.2009.07.012

Cited by 54 publications

(25 citation statements)

References 41 publications

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“…18 These results suggest the gradual transformation of CrN to Cr 2 N and the formation of Cr-Zr-N solid solution. 17,19 It is also observed that the Zr 3d (3d 5/2 , 3d 3/2 ) XPS peaks are composed of spin-orbit doublets, with a separation of 2.3 eV and a slight chemical shift to the higher binding energy with an increase in the Zr content (Fig. 2c).…”

Section: Gasmentioning

confidence: 84%

Characterisation of R.F. magnetron sputtered Cr-N, Cr-Zr-N and Zr-N coatings

Fellah

Aissani

Samad

et al. 2017

Transactions of the IMF

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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. Binary Cr-N, Zr-N and Cr-Zr-N films were synthesised using a R.F. reactive magnetron sputtering technique by co-sputtering Cr and Zr. The crystalline structure, morphology, mechanical and tribological properties of the films as a function of Zr content were characterised by X-ray diffraction, microanalysis X (WDS, EDS), X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy, nanoindentation, scratch adhesion and pin-on-disc sliding wear tests. The residual stress was calculated with the Stoney formula. The Cr-Zr-N films exhibit a two-phase microstructure, containing a cubic (CrN, ZrN) with hexagonal (Cr 2 N, Zr 2 N) phases, as shown by X-ray diffraction. As the Zr content increased, a columnar and compact structure is developed with a low surface roughness. The results reveal that the mechanical and tribological properties of the films were found to depend on the Zr content and the hardness (maximum 26.3 GPa) is greatly improved in comparison with CrN and ZrN films, especially at 31 at.-% Zr. In the scratch test, the hardest film (Cr 0.18 Zr 0.31 N 0.47 ) exhibited an adhesive failure at Lc 2 = 34.3 N.

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Section: Gasmentioning

confidence: 84%

Characterisation of R.F. magnetron sputtered Cr-N, Cr-Zr-N and Zr-N coatings

Fellah

Aissani

Samad

et al. 2017

Transactions of the IMF

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“…Leyland and Matthews [56,57] indicated that coating elasticity and toughness are important factors in wear, particularly in abrasion, impact and erosive wear. The elasticity effect can be evaluated using H/E ratio, and it has shown some merits according to various researchers [58][59][60]. In this article, H/E r is used instead of H/E, assuming that the m can be treated as a constant.…”

Section: Discussionmentioning

confidence: 99%

Low Temperature Nano-Tribological Study on a Functionally Graded Tribological Coating Using Nanoscratch Tests

et al. 2011

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Previous studies on low temperature tribological investigations were limited to macro-scale studies because of the lack of suitable instrumentation. This limitation has been overcome using a newly developed low temperature nanoscratch tester capable of characterizing the scratch resistance of coatings down to -30°C. The scratch resistance and mechanical properties of a functionally graded a-C:H(Ti)/ TiCN/TiN/Ti coating have been investigated for temperatures ranging from 25 to -30°C. It has been found that the a-C:H(Ti)/TiCN/TiN/Ti coating failed at high loads by cracking and spallation during the room-temperature scratch tests. Fractography suggests that these failures originate from or close to the interface between the top a-C:H(Ti) and the TiCN layers. Decreasing the test temperature from 25 to 0°C resulted in increased values in H, H/E r and H 3 /E r 2 , consistent with improved crack-and wear resistances, with further smaller improvements being achieved on further decreasing the temperature to -30°C.

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“…It can be concluded that the solid solution strengthening, the refined crystalline strengthening, and the increase of residual compressive stress all played a role in enhancing the hardness of the film [19]. While the reduction in hardness with a further increase in Ti and B contents after maximum hardness is as a result of increase of amorphous BN phase [20][21][22].…”

Section: Mechanical Propertiesmentioning

confidence: 95%

Research on Microstructure, Mechanical and Tribological Properties of Cr-Ti-B-N Films

Luo

Bian

et al. 2017

Coatings

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Abstract:In this study, the Cr-Ti-B-N composite thin films with different Ti and B contents in the films were fabricated by a reactive magnetron sputtering system using chromium (Cr) and TiB 2 targets. The microstructure, mechanical properties, and friction properties over broad ranges of temperature were detected by XRD, SEM, TEM, nano-indentation, 3D profilometer, and tribometer. It was found that the Cr-Ti-B-N films exhibited a double face-centered cubic (fcc)-CrN and amorphous-BN structure. As the Ti and B elements were introduced, the hardness and elastic modulus of Cr-Ti-B-N films increased from 21 and 246.5 GPa to a maximum value of approximately 28 and 283.6 GPa for Cr 38.7 Ti 3.7 B 6.4 N 51.2 film, and then decreased slightly with a further increase of Ti and B contents. The hardness enhancement was attributed to the residual compressive stress. The friction and wear resistance of the film was improved obviously by the addition of Cr and B, as compared with the CrN film under 200 • C.

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Structure and properties of selected (Cr–Al–N, TiC–C, Cr–B–N) nanostructured tribological coatings

Cited by 54 publications

References 41 publications

Characterisation of R.F. magnetron sputtered Cr-N, Cr-Zr-N and Zr-N coatings

Characterisation of R.F. magnetron sputtered Cr-N, Cr-Zr-N and Zr-N coatings

Low Temperature Nano-Tribological Study on a Functionally Graded Tribological Coating Using Nanoscratch Tests

Research on Microstructure, Mechanical and Tribological Properties of Cr-Ti-B-N Films

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