Diffusion carbide coatings formed in molten borax systems

Arai, Tohru; Fujita, Hideyuki; Sugimoto, Yoshiaki; Ohta, Yukio

doi:10.1007/bf02833709

Cited by 67 publications

(59 citation statements)

References 6 publications

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“…Such formation is feasible due to its lower free energy for carbide formation and higher free energy for oxide formation than boron [12]. This carbide exhibits a number of interesting characteristics for tribological applications [13].…”

Section: Introductionmentioning

confidence: 99%

Wear and corrosion of niobium carbide coated AISI 52100 bearing steel

Fernandes

Gallego

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et al. 2015

Surface and Coatings Technology

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Bearing steels must have high hardness, good wear resistance and dimensional stability. In the present work the AISI 52100 bearing steel was selected as the substrate for a niobium carbide coating produced by a salt-bath thermoreactive deposition process. The present work addresses the effect of niobium carbide coating on the wear and corrosion resistance of the abovementioned steel. A homogeneous layer composed solely by the cubic niobium carbide (NbC) was produced. The carbide coating yielded average hardness and elastic modulus of 26GPa and 361GPa, respectively. No significant decarburization was detected beneath the case by means of hardness fluctuations. Dry wear tests resulted in worn volumes 10 times smaller for the NbC coated steel, comparatively to the untreated substrate, at three different applied loads. Corrosion tests in NaCl solution indicated an improved behaviour for the carbide coated bearing steel at applied potentials inferior than 250mV. At higher potentials the electrolyte appears to penetrate trough the layer yielding wide corrosion caps.

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Section: Introductionmentioning

confidence: 99%

Wear and corrosion of niobium carbide coated AISI 52100 bearing steel

Fernandes

Gallego

Picon

et al. 2015

Surface and Coatings Technology

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“…Los recubrimientos obtenidos por DTR se producen en crisoles dentro de hornos de resistencia a altas temperaturas, no requieren algún tipo de atmosfera protectora y adicionalmente el proceso no emite ningún tipo de gases contaminantes [5,6]. El proceso de DTR se puede considerar como una combinación del tratamiento de borizado [7] y del tratamiento termoquímico de cementación.…”

Section: Introductionunclassified

Recubrimientos de VC y NBC producidos por DRT: Tecnología económica, eficiente y ambientalmente limpia

Castillejo¹,

Flórez

2012

Cien.Ing.Neogranadina

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“…However, superior hardness values were reported when carbon was presented in the coating. Similar results could be expectable with other transition metals because they generally form harder carbides rather than nitrides [13].…”

Section: Introductionmentioning

confidence: 59%