Thin silicon carbide (SiC) films were deposited from tetramethylsilame/hydrogen gas mixture on Co-cemented tungsten carbide (WC-Co) inserts by using Hot-Filament Chemical Vapour Deposition (HFCVD) technique. Grazing incidence X-Ray Diffraction (XRD) confirmed that the films were composed of cubic silicon carbide (beta-SiC) and that small amounts of clicobalt silicide (Co2Si) were formed. These films were used as intedayers for subsequent CVD of diamond films. XRD and combined Scanning and Transmission Electron Microscopies showed that the binder phase reacted during CVD to form cobalt silicides. However, these intermetallic compounds did not have bad effects on diamond adhesion. Dry turning of graphite was chosen to check the multilayer (SiC+diamond) film performance. For the sake of comparison, machining tests were also carried out under identical conditions using commercial sintered diamond (PCD) inserts and WC-Co diamond coated inserts with no interlayer. The wear mechanism of the tools has been identified and correlated with the criterion used to evaluate the tool life. The results showed that multilayer (SiC+diamond) coatings exhibited the longest tool lives. Therefore, thin Sic interlayers proved to be a new viable alternative and a suitable option for adherent diamond coatings on cemented carbide components and cutting tools. (C) 2008 Elsevier B.V. All rights reserved.

Cabral, G., Gabler, J., Lindner, J., Gracio, J., Polini, R. (2008). A study of diamond film deposition on WC-Co inserts for graphite machining: Effectiveness of SiC interlayers prepared by HFCVD. DIAMOND AND RELATED MATERIALS, 17(6), 1008-1014 [10.1016/j.diamond.2008.03.017].

A study of diamond film deposition on WC-Co inserts for graphite machining: Effectiveness of SiC interlayers prepared by HFCVD

POLINI, RICCARDO
2008-01-01

Abstract

Thin silicon carbide (SiC) films were deposited from tetramethylsilame/hydrogen gas mixture on Co-cemented tungsten carbide (WC-Co) inserts by using Hot-Filament Chemical Vapour Deposition (HFCVD) technique. Grazing incidence X-Ray Diffraction (XRD) confirmed that the films were composed of cubic silicon carbide (beta-SiC) and that small amounts of clicobalt silicide (Co2Si) were formed. These films were used as intedayers for subsequent CVD of diamond films. XRD and combined Scanning and Transmission Electron Microscopies showed that the binder phase reacted during CVD to form cobalt silicides. However, these intermetallic compounds did not have bad effects on diamond adhesion. Dry turning of graphite was chosen to check the multilayer (SiC+diamond) film performance. For the sake of comparison, machining tests were also carried out under identical conditions using commercial sintered diamond (PCD) inserts and WC-Co diamond coated inserts with no interlayer. The wear mechanism of the tools has been identified and correlated with the criterion used to evaluate the tool life. The results showed that multilayer (SiC+diamond) coatings exhibited the longest tool lives. Therefore, thin Sic interlayers proved to be a new viable alternative and a suitable option for adherent diamond coatings on cemented carbide components and cutting tools. (C) 2008 Elsevier B.V. All rights reserved.
2008
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Con Impact Factor ISI
Cutting tools; Diamond films; Hot Filament CVD; Silicon carbide
https://www.sciencedirect.com/science/article/pii/S0925963508002422?via=ihub
Cabral, G., Gabler, J., Lindner, J., Gracio, J., Polini, R. (2008). A study of diamond film deposition on WC-Co inserts for graphite machining: Effectiveness of SiC interlayers prepared by HFCVD. DIAMOND AND RELATED MATERIALS, 17(6), 1008-1014 [10.1016/j.diamond.2008.03.017].
Cabral, G; Gabler, J; Lindner, J; Gracio, J; Polini, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/26950
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