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Amorphic Diamond Films Produced by Laser Ablation

Published online by Cambridge University Press:  01 January 1992

C. B. Collins ,
F. Davanloo ,
T. J. Lee ,
J. H. You  and
H. Park
C. B. Collins
Affiliation:
Center for Quantum Electronics, University of Texas at Dallas, P. O. Box 830688, Richardson, Texas 75083–0688
F. Davanloo
Affiliation:
Center for Quantum Electronics, University of Texas at Dallas, P. O. Box 830688, Richardson, Texas 75083–0688
T. J. Lee
Affiliation:
Center for Quantum Electronics, University of Texas at Dallas, P. O. Box 830688, Richardson, Texas 75083–0688
J. H. You
Affiliation:
Center for Quantum Electronics, University of Texas at Dallas, P. O. Box 830688, Richardson, Texas 75083–0688
H. Park
Affiliation:
Center for Quantum Electronics, University of Texas at Dallas, P. O. Box 830688, Richardson, Texas 75083–0688
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Abstract

Four types of diamond films have been shown to be stable and free from hydrogen: crystalline diamond, amorphic diamond, i-C and defected graphite. Each is significantly harder than other forms of carbon, but only now are quantitative values of hardness being reported. In this work nanoindentation techniques were used on these highly elastic films and linear ranges of plastic response were identified. Values of hardness were extracted from the on-load data for amorphic diamond and crystalline diamond that could not be distinguished from the hardness of naturally occurring diamond. This seems to explain why thin layers of amorphic diamond have been so effective in protecting substrates from the erosive impacts of particles and droplets reported in previous studies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 285: Symposium I – Laser Ablation in Materials Processing–Fundamentals and Applications , 1992 , 547
Copyright
Copyright © Materials Research Society 1993

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References

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