Synthesis of Vanadium Interface for HFCVD Diamond Deposition on Steel Surface

AUTOR(ES)

Damm, Djoille Denner, Contin, Andre, Trava-Airoldi, Vladimir Jesus, Vasconcelos, Getúlio de, Barquete, Danilo Maciel, Corat, Evaldo J.

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

06/07/2017

RESUMO

Laser cladding of vanadium carbide powder developed an interlayer on AISI D6 steel as a diffusional barrier and to relief thermal residual stress. Laser cladding experiments varied resolution (DPI) and scanning speed (mm/s). CVD diamond deposition on this interface went on by HFCVD technique. The coatings were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM-FEG) and Raman spectroscopy. Ordered state V8C7 phase prevailed in the interlayer. The thickness of heat-affected zone (HAZ) and Laser Cladding Vanadium Coating (LCVC) were 37 µm and 5 µm, respectively, in the best layer produced. The diamond film showed good quality and morphology. The Raman peak at 1342,13 cm-1 shows the residual stresses level undertaken at the film-substrate interface and the corresponding adhesion, demonstrating the suitability of the VC laser cladding process to CVD diamond films deposition.

ASSUNTO(S)

vanadium carbide hard coatings laser cladding thermal stress diffusion barrier and hfcvd diamond

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