Abstract
This paper studies the anisotropic elastic constants of a CVD polycrystalline diamond film using acoustic spectroscopy and micromechanics modeling. Many films exhibit elastic anisotropy between the film-growth direction and inplane direction and possess five independent elastic constants; they are C11, C33, C12, C13 and C44 when the x3 axis is along the film-growth direction. Combination of resonance ultrasound spectroscopy (RUS) and electromagnetic acoustic resonance (EMAR) deduces the four independent elastic constants among them, including C44 and C66, with which the elastic anisotropy is discussed. We found 5-10% anisotropy between them and considerably small elastic constants compared with an isotropic polycrystalline diamond. We attribute the anisotropy and small elastic constants of the CVD diamond film to local incomplete cohesion. This view is supported by a micromechanics calculation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Materials Science, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
