Acid pretreatment of WC-Co prior to CVD diamond coating
Pretreatment on tungsten carbide (WC-Co) surface is critical for obtaining perfectly adherent diamond coatings by chemical vapor deposition (CVD). The carbide surface should have high roughness to facilitate diamond nucleation and adhesion. The presence of cobalt—common binder for tungsten carbide—o...
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my.utm.465552017-09-13T08:03:02Z http://eprints.utm.my/id/eprint/46555/ Acid pretreatment of WC-Co prior to CVD diamond coating Mohd. Yusof, Noordin Aluwi Shakir, Noor Adila Sudin, Izman Kurniawan, Denni TA Engineering (General). Civil engineering (General) Pretreatment on tungsten carbide (WC-Co) surface is critical for obtaining perfectly adherent diamond coatings by chemical vapor deposition (CVD). The carbide surface should have high roughness to facilitate diamond nucleation and adhesion. The presence of cobalt—common binder for tungsten carbide—on the surface to be coated should be made minimum since it has negative influence on the diamond deposition process. In this study, surface pretreatment on tungsten carbide using sulfuric acid was evaluated in terms of the resulted cobalt removal and the surface roughening. The variables included were acid concentration, reaction temperature, and reaction time. The resulted surface roughness was 29% higher than initial, averaged at 1.07 µm. The acid pretreatment was also found effective in eliminating surface cobalt. 2012 Article PeerReviewed Mohd. Yusof, Noordin and Aluwi Shakir, Noor Adila and Sudin, Izman and Kurniawan, Denni (2012) Acid pretreatment of WC-Co prior to CVD diamond coating. Advanced Materials Research, 576 . pp. 626-629. ISSN 1022-6680 http://dx.doi.org/10.4028/www.scientific.net/AMR.576.626 |
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TA Engineering (General). Civil engineering (General) Mohd. Yusof, Noordin Aluwi Shakir, Noor Adila Sudin, Izman Kurniawan, Denni Acid pretreatment of WC-Co prior to CVD diamond coating |
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Pretreatment on tungsten carbide (WC-Co) surface is critical for obtaining perfectly adherent diamond coatings by chemical vapor deposition (CVD). The carbide surface should have high roughness to facilitate diamond nucleation and adhesion. The presence of cobalt—common binder for tungsten carbide—on the surface to be coated should be made minimum since it has negative influence on the diamond deposition process. In this study, surface pretreatment on tungsten carbide using sulfuric acid was evaluated in terms of the resulted cobalt removal and the surface roughening. The variables included were acid concentration, reaction temperature, and reaction time. The resulted surface roughness was 29% higher than initial, averaged at 1.07 µm. The acid pretreatment was also found effective in eliminating surface cobalt. |
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Article |
author |
Mohd. Yusof, Noordin Aluwi Shakir, Noor Adila Sudin, Izman Kurniawan, Denni |
author_facet |
Mohd. Yusof, Noordin Aluwi Shakir, Noor Adila Sudin, Izman Kurniawan, Denni |
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Mohd. Yusof, Noordin |
title |
Acid pretreatment of WC-Co prior to CVD diamond coating |
title_short |
Acid pretreatment of WC-Co prior to CVD diamond coating |
title_full |
Acid pretreatment of WC-Co prior to CVD diamond coating |
title_fullStr |
Acid pretreatment of WC-Co prior to CVD diamond coating |
title_full_unstemmed |
Acid pretreatment of WC-Co prior to CVD diamond coating |
title_sort |
acid pretreatment of wc-co prior to cvd diamond coating |
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2012 |
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http://eprints.utm.my/id/eprint/46555/ http://dx.doi.org/10.4028/www.scientific.net/AMR.576.626 |
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13.19449 |