Materials 2011, 4(5), 857-868; doi:10.3390/ma4050857
Article

Synthesis and Characterization of Multilayered Diamond Coatings for Biomedical Implants

1 Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA 2 Department of Physics, the University of Alabama at Birmingham, Birmingham, AL 35294, USA 3 Vista Engineering, Birmingham, AL 35203, USA
* Author to whom correspondence should be addressed.
Received: 6 April 2011; in revised form: 25 April 2011 / Accepted: 5 May 2011 / Published: 9 May 2011
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Abstract: With incredible hardness and excellent wear-resistance, nanocrystalline diamond (NCD) coatings are gaining interest in the biomedical community as articulating surfaces of structural implant devices. The focus of this study was to deposit multilayered diamond coatings of alternating NCD and microcrystalline diamond (MCD) layers on Ti-6Al-4V alloy surfaces using microwave plasma chemical vapor deposition (MPCVD) and validate the multilayer coating’s effect on toughness and adhesion. Multilayer samples were designed with varying NCD to MCD thickness ratios and layer numbers. The surface morphology and structural characteristics of the coatings were studied with X-ray diffraction (XRD), Raman spectroscopy, and atomic force microscopy (AFM). Coating adhesion was assessed by Rockwell indentation and progressive load scratch adhesion tests. Multilayered coatings shown to exhibit the greatest adhesion, comparable to single-layered NCD coatings, were the multilayer samples having the lowest average grain sizes and the highest titanium carbide to diamond ratios.
Keywords: nanocrystalline diamond; chemical vapor deposition; multilayer; adhesion

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MDPI and ACS Style

Booth, L.; Catledge, S.A.; Nolen, D.; Thompson, R.G.; Vohra, Y.K. Synthesis and Characterization of Multilayered Diamond Coatings for Biomedical Implants. Materials 2011, 4, 857-868.

AMA Style

Booth L, Catledge SA, Nolen D, Thompson RG, Vohra YK. Synthesis and Characterization of Multilayered Diamond Coatings for Biomedical Implants. Materials. 2011; 4(5):857-868.

Chicago/Turabian Style

Booth, Leigh; Catledge, Shane A.; Nolen, Dustin; Thompson, Raymond G.; Vohra, Yogesh K. 2011. "Synthesis and Characterization of Multilayered Diamond Coatings for Biomedical Implants." Materials 4, no. 5: 857-868.

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