2017
DOI: 10.1590/s1517-707620170001.0119
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Investigation of borided layers contribution on the wear resistance and adhesion of TiN coatings

Abstract: The purpose of the investigation was to examine the possibility of improving tool life by reducing the wear effect and improving the adhesion of a thin film through a compound configuration that consists in boriding and PVD deposition. Single layer coatings of TiN were deposited by PVD (cathodic arc) on quenched and tempered and on borided powder metallurgy (P/M) AISI M2 steel. Adhesion test was performed according VDI 3198. Microhardness measurements were performed on Vickers scale and the tribological behavi… Show more

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Cited by 4 publications
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“…This could be due to the microstructure heterogeneity of boroniobized samples. While the AISI 52100 steel ball slides over an SiC-coated AISI 1020 surface in the untreated condition leading to an artificial reduction of the wear coefficient for this surface condition [28,[41][42][43], the presence of the porous region in the iron/niobium borides interface in the boroniobized samples may lead to a decrease in the load bearing capacity of the substrate, accelerating the beginning of the wear process through the delamination of the niobium boride layer [44][45][46][47]. Indeed, for a 0.98 N applied load and 0.5 g cm −3 abrasive slurry concentration (lower k according to table 1), the wear crater depth obtained from equation (2) ranged from 22.5 to 87.3 μm for a sliding distance variation of 4-96 m. For the condition that showed the higher wear coefficient, 0.49 N applied load and 0.5 g cm −3 slurry concentration, the wear crater depth ranged from 32.3 to 84.5 μm for the same sliding distance variation.…”
Section: Tribological Behaviormentioning
confidence: 99%
“…This could be due to the microstructure heterogeneity of boroniobized samples. While the AISI 52100 steel ball slides over an SiC-coated AISI 1020 surface in the untreated condition leading to an artificial reduction of the wear coefficient for this surface condition [28,[41][42][43], the presence of the porous region in the iron/niobium borides interface in the boroniobized samples may lead to a decrease in the load bearing capacity of the substrate, accelerating the beginning of the wear process through the delamination of the niobium boride layer [44][45][46][47]. Indeed, for a 0.98 N applied load and 0.5 g cm −3 abrasive slurry concentration (lower k according to table 1), the wear crater depth obtained from equation (2) ranged from 22.5 to 87.3 μm for a sliding distance variation of 4-96 m. For the condition that showed the higher wear coefficient, 0.49 N applied load and 0.5 g cm −3 slurry concentration, the wear crater depth ranged from 32.3 to 84.5 μm for the same sliding distance variation.…”
Section: Tribological Behaviormentioning
confidence: 99%