In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 33, No. 10R ( 1994-10-01), p. 5875-
Abstract:
A diamond/amorphous carbon powder mixture was shock-compressed by a
rod-in-cylinder method. Characterization by high-resolution electron microscopy (HREM) revealed the formation of several carbon
modifications. Beside a large amount of graphite, two cubic phases of carbon, turbostratic carbon and chaoite were detected in small quantities.
Different phase transition mechanisms were proposed. High temperatures and high pressures in the powder sample resulted in the transformation of
amorphous carbon into graphite. One cubic phase corresponded to a modification of diamond (n-diamond)
in a previous report determined by observation of the forbidden {200}, {222} and {420} reflections of cubic diamond. We related the presence of
these reflections not to cubic diamond, but to a carbon form with a face-centered-cubic (fcc) lattice formed by local melting of the
diamond surface and subsequent rapid quenching, and via a solid-vapor-liquid-solid (SVLS) path of phase transitions in
amorphous carbon particles. The second cubic phase originated from the deposition of a gaseous or liquid carbon jet on diamond. The lattice
parameter was calculated to a o = 0.432 nm.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.33.5875
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1994
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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