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Diamond synthesis by high-velocity thermal spray: The laboratory analogue of a meteorite impact

Published online by Cambridge University Press:  31 January 2011

R. Goswami ,
H. Herman ,
S. Sampath  and
J. B. Parise
R. Goswami
Affiliation:
Center for Thermal Spray Research, Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794
H. Herman
Affiliation:
Center for Thermal Spray Research, Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794
S. Sampath
Affiliation:
Center for Thermal Spray Research, Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794
J. B. Parise
Affiliation:
Department of Geosciences and Center for High Pressure Research, State University of New York at Stony Brook, Stony Brook, New York 11794
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Extract

Nanocrystalline-diamond particles were produced in the form of a coating by depositing Ni-clad graphite powder in a high-velocity thermal spray experiment. Particles were accelerated to impact and formed a thick film (>20 μm) on a steel substrate, with the high-velocity impact generating a shock wave, which propagates through the particle and the underlying deposits. Transmission electron microscopy revealed that this deposit contains cubic diamond nanocrystals having a size range of 5 to 10 nm in graphite. In addition to diamond, it was observed that a portion of the deposit contains “closed-curved graphite.”

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 1 , January 2000 , pp. 25 - 28
Copyright
Copyright © Materials Research Society 2000

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