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On the role of penetration twins in the morphological development of vapor-grown diamond films

Published online by Cambridge University Press:  03 March 2011

M.A. Tamor  and
M.P. Everson
M.A. Tamor
Affiliation:
Research Laboratory, Ford Motor Company, SRL/MD3028, Dearborn, Michigan 48121-2053
M.P. Everson
Affiliation:
Research Laboratory, Ford Motor Company, SRL/MD3028, Dearborn, Michigan 48121-2053
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Abstract

Polycrystalline diamond films may be produced by chemical vapor deposition (CVD) with morphologies ranging from multimicron crystallites with well-defined facets and texture to nanocrystalline “cauliflower” nodules. While previous efforts to connect diamond film “quality” to growth conditions focus on competitive growth of non-diamond phases, we propose that twinning is a major controlling factor. We use geometric arguments to define the conditions under which a given twin can outgrow and bury the “parent” face on which it originated. We then show how the full spectrum of diamond crystallite shapes and film morphologies can be explained in terms of penetration twins without reference to the actual mechanistics of diamond growth.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 7 , July 1994 , pp. 1839 - 1849
Copyright
Copyright © Materials Research Society 1994

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