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Proceedings Paper

Properties of diamond grown from CO2 containing gas chemistries
Author(s): Tim P. Mollart; Keith L. Lewis; G. M. Williams
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Paper Abstract

The structural, optical and mechanical properties of CVD diamond grown using chemistries on the H-CO tie line have been investigated. A microwave plasma CVD system has been used with methane and ethylene containing gas chemistries to grow free standing optical quality diamond layers. When these feed stock gases are combined with carbon dioxide and hydrogen they enable the H-CO tie line to be traversed up to the central region of the Bachmann growth diagram. The structural properties were assessed using SEM, cathodoluminescence, Raman spectroscopy and x-ray diffraction techniques. The optical properties were assessed using several techniques including measurements of spectral emissivity over a range of temperatures and the role of nitrogen impurities identified. The trends in the optical characteristics will be discussed in relation to differences in mechanical properties with a view of evaluating the viability of using oxygen-based chemistries for the fabrication of diamond components.

Paper Details

Date Published: 26 July 1999
PDF: 9 pages
Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); doi: 10.1117/12.354621
Show Author Affiliations
Tim P. Mollart, Defence Evaluation and Research Agency Malvern (United Kingdom)
Keith L. Lewis, Defence Evaluation and Research Agency Malvern (United Kingdom)
G. M. Williams, Defence Evaluation and Research Agency Malvern (United Kingdom)

Published in SPIE Proceedings Vol. 3705:
Window and Dome Technologies and Materials VI
Randal W. Tustison, Editor(s)

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