Synthesis and Characterization of Multilayered Diamond Coatings for Biomedical Implants

Materials

Leigh Booth¹  Shane A. Catledge²  Dustin Nolen³  Raymond G. Thompson³ 

[1] Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; E-Mail:;Department of Physics, the University of Alabama at Birmingham, Birmingham, AL 35294, USA; E-Mail:;Vista Engineering, Birmingham, AL 35203, USA; E-Mails:

关键词: nanocrystalline diamond;    chemical vapor deposition;    multilayer;    adhesion;   

DOI  :  10.3390/ma4050857

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.