Effect of a-CNx top layer on the electrochemical properties of Ta2N/Ta multilayers obtained by HIPIMS

Pérez‐Álvarez, J.; Flores-Jiménez, M.; Rivera-Tello, César D.; Suárez-Martínez, Reynier; Jiménez, O.; Flores-Cova, L.; Flores, M.

doi:10.1016/j.matlet.2020.128454

Cited by 4 publications

(2 citation statements)

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“…The CrAl phase showed a glassy morphology in both samples, with a (a-CN x ) top layer in the S2 sample (see Figure 3b). Similar results have been reported in other studies [9,17,40,41]. However, the CrAlN phase presented the characteristic columnar morphology in both samples S1 and S2, as can be see in Figure 3a,b, respectively.…”

Section: Structure Morphology and Chemical Characterizationsupporting

confidence: 90%

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Mechanical and Tribological Properties of the CrAl/CrAlN and CrAl/CrAlN-(a-CNx) Multilayers Deposited by HIPIMS

Martínez-González,

Flores-Jiménez,

Bravo-Barcenas

et al. 2023

Coatings

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In this study, two CrAl/CrAlN multilayer coatings of 1.5 µm and 1.2 µm thicknesses were deposited from a (50:50) CrAl sectioned target by high-power impulse magnetron sputtering (HIPIMS) onto A11 tool steel to evaluate the effect over mechanical and tribological properties by the addition of an (a-CNx) top layer. XRD analysis showed a CrAlN FCC structure (111) and a Cr phase (110). A glass-like morphology was observed in the CrAl layer and in the (a-CNx) top layer, while the CrAlN layers exhibited a columnar morphology according to the FE-SEM analysis. Raman analysis results confirmed characteristic peaks G and D for the carbon amorphous structure of the (a-CNx) top layer. Nanoindentation results showed comparable hardnesses (23.08 GPa ± 2.8 and 20.58 GPa ± 1.8) in both multilayer coatings. The CrAl/CrAlN multilayer with an (a-CNx) top layer increased the absorption energy capacity and the mechanical potential energy stored. The nano scratch test showed the strongest crack resistance and highest adhesive energy values for the CrAl/CrAlN multilayer. The addition of an (a-CNx) top layer improved the tribological behavior when higher normal loads were applied during the fretting test. Raman analysis showed an increase in the I(D)/I(G) ratio and a formation of a carbon sp2 structure (i.e., graphite-like structure) over the worn surfaces, as well as dissipated energy (J/m) during the fretting test.

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Section: Structure Morphology and Chemical Characterizationsupporting

confidence: 90%

“…The CrAl phase showed a glassy morphology in both samples, with a (a-CNx) top layer in the S2 sample (see Figure 3b). Similar results have been reported in other studies [9,17,40,41]. However, the CrAlN In the other hand, sample S2 with an (a-CN x ) top layer was characterized by Raman spectroscopy.…”

Section: Structure Morphology and Chemical Characterizationsupporting

confidence: 87%