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Highly adherent diamond coatings deposited onto WC-Co cemented carbides via barrier interlayers

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Abstract

Diamond coatings have been deposited by plasma enhanced chemical vapor deposition (PCVD) onto WC-Co cemented carbides by use of specially developed barrier interlayers, well compatible with cemented carbides. The barrier interlayer comprises a Ti-based layer adjacent to the substrate, which completely prevents both substrate decarburization and Co diffusion from the substrate, and a diamond-bonding layer needed to obtain high adhesion to the diamond coating. The diamond-bond layer is obtained by seeding the surface with nanograined diamond particles by laser ablation. Diamond deposition under controlled parameters allows one to obtain fine-grained and uniform diamond coatings. The diamond coating obtained in this way has a high adhesion to the cemented carbide substrate due to the enhanced interaction through the nanograined diamond interlayer.

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Authors and Affiliations

  1. Physics Department, Cayetano Heredia University, Av. Honorio Delgado 430, 31, Lima, Peru

    J. M. Lopez

  2. Department of Physical Electronics, Lomonosov Moscow State University, Vorobjevy Gory, 119899, Moscow, Russia

    V. G. Babaev & V. V. Khvostov

  3. Instituto Ciencia de Materiales, Cantoblanco, Madrid, Spain

    J. M. Albella

Authors
  1. J. M. Lopez
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  2. V. G. Babaev
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  3. V. V. Khvostov
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  4. J. M. Albella
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Lopez, J.M., Babaev, V.G., Khvostov, V.V. et al. Highly adherent diamond coatings deposited onto WC-Co cemented carbides via barrier interlayers. Journal of Materials Research 13, 2841–2846 (1998). https://doi.org/10.1557/JMR.1998.0388

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  • DOI: https://doi.org/10.1557/JMR.1998.0388

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