Sustainable super-hard and thick nanodiamond composite film deposited on cemented carbide substrates with an interfacial Al-interlayer.

Egiza, Mohamed; Diab, Mohamed Ragab; Ali, Ali M.; Murasawa, Koki; Yoshitake, Tsuyoshi

Abstract

Super-hard nanodiamond composite (NDC) films, synthesized via cathodic arc plasma deposition on unheated WC−Co substrates, offer an eco-friendly solution for cutting tools. A 100 nm-thick Al-interlayer mitigates Co catalytic effects, improving adhesion and yielding smooth and dense 10 µm-thick films at a deposition rate of 3.3μm/hr. These grain-boundary-rich nanostructured films, with an impressive 58 GPa hardness attributed to a substantial 70% C sp3 fraction, prove optimal for hard coatings. The Al-interlayer effectively suppresses Co catalytic effects, forming a dense Al-oxide layer, enhancing film hardness and adhesion (Lcr=18.6N). NDC films present a promising eco-friendly option for high-performance hard coatings.

Citation

EGIZA, M., DIAB, M.R., ALI, A.M., MURASAWA, K. and YOSHITAKE, T. 2024. Sustainable super-hard and thick nanodiamond composite film deposited on cemented carbide substrates with an interfacial Al-interlayer. Materials letters [online], 364, article number 136369. Available from: https://doi.org/10.1016/j.matlet.2024.136369

• Journal Article Type: Article
• Acceptance Date: Mar 25, 2024
• Online Publication Date: Mar 26, 2024
• Publication Date: Jun 1, 2024
• Deposit Date: Mar 26, 2024
• Publicly Available Date: Mar 26, 2024
• Journal: Materials letters
• Print ISSN: 0167-577X
• Electronic ISSN: 1873-4979
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 364
• Article Number: 136369
• DOI: https://doi.org/10.1016/j.matlet.2024.136369
• Keywords: Nanocomposites; Arc plasma; Mechanical properties; Al-interlayer; Catalytic effects; Surface interface
• Public URL: https://rgu-repository.worktribe.com/output/2283845
• Additional Information: This article has been published with separate supporting information. This supporting information has been incorporated into a single file on this repository and can be found at the end of the file associated with this output.