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The Effects of Friction and Wear on PECVD Diamond Films.

Published online by Cambridge University Press:  21 February 2011

M. L. Languell
Affiliation:
Departments of Mechanical Engineering and Materials Science Engineering, Vanderbilt University, Nashville, TN 37212
J. L. Davidson
Affiliation:
Departments of Mechanical Engineering and Materials Science Engineering, Vanderbilt University, Nashville, TN 37212
J. J. Wert
Affiliation:
Departments of Mechanical Engineering and Materials Science Engineering, Vanderbilt University, Nashville, TN 37212
M. A. George
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
W. E. Collins
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
A. Burger
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
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Abstract

The effects of friction and wear were examined on plasma enhanced chemical vapor deposition (PECVD) diamond films deposited on tungsten substrates. The tribology of diamond on diamond was studied and the changes in surface roughness and the bearing ratio were determined before and after wear. The (111) textured heteroepitaxial films were studied morphologically by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The changes in morphology involved a transition from the large as grown diamond crystallites with a mean diameter of 10 μm to a surface with grains as small as 100 nm. The nature of the wear-modified films will be discussed regarding the possible mechanisms for the surface changes.

Work partially supported by NASA Lewis Research Center grant NAG3–1430.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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