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Diamond nucleation by carbon fibers on unscratched substrate by hot-filament chemical vapor deposition

Published online by Cambridge University Press:  03 March 2011

Yoshikazu Nakamura ,
Kazunori Tamaki ,
Yoshihisa Watanabe  and
Shigekazu Hirayama
Yoshikazu Nakamura
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, 1–10–20 Hashirimizu, Yokosuka, Kanagawa 239, Japan
Kazunori Tamaki
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, 1–10–20 Hashirimizu, Yokosuka, Kanagawa 239, Japan
Yoshihisa Watanabe
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, 1–10–20 Hashirimizu, Yokosuka, Kanagawa 239, Japan
Shigekazu Hirayama
Affiliation:
Department of Materials Science and Engineering, National Defense Academy, 1–10–20 Hashirimizu, Yokosuka, Kanagawa 239, Japan
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Abstract

In order to overcome the difficulty of nucleation of diamond particles on unscratched substrates by the chemical vapor deposition (CVD) method, carbon fibers are introduced on unscratched substrates as a nucleation site of diamond particles. With assistance of carbon fibers, diamond particles can be synthesized on unscratched silicon substrate from a gas mixture of methane and hydrogen by the hot-filament CVD method. From SEM observations, nucleation of diamond particles has been confirmed on fibers at the beginning of deposition. Fine particles have formed initially on the rugged surface of fibers, and then they grow up to be diamond particles. Detailed SEM observations reveal nucleation has occurred on irregular surfaces such as boundaries on carbon fibers. We propose that nucleation of diamond particles can be controlled by arranging carbon fibers on the substrate without applying any mechanical pretreatment.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 9 , Issue 7 , July 1994 , pp. 1619 - 1621
Copyright
Copyright © Materials Research Society 1994

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References

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