Carbon was deposited on virgin, natural diamond powder from methane gas at 1050°C and 0.3 Torr. The deposits were identified as new diamond by chemical analysis, chemical etching, density measurements, x‐ray and electron diffraction, microwave absorption, electron spin resonance, and visual observations. The crystalline quality of the new diamond layers has not been established; it cound range from polycrystalline material with a large number of defects to true epitaxial layers.
REFERENCES
1.
2.
F. P.
Bundy
, H. T.
Hall
, H. M.
Strong
, and R. H.
Wentorf
, Nature
176
, 51
(1955
).3.
A. R. Ubbelohde and F. A. Lewis, Graphite and Its Crystal Compounds (Oxford University Press, London, 1960), p. 62.
4.
C. G. Suits, The Synthesis of Diamond—A Case History in Modern Science, A paper presented before the American Chemical Society, Rochester, New York, Nov. 3, 1960, Reference is made to an unpublished report by R. A. Oriani and W. A. Rocco.
5.
6.
J. C. Angus, Synthesis of Diamonds, unpublished report, Nov., 1961.
7.
J. A. Brinkman, U.S. patent No. 3,142,539, July 28, 1964.
8.
W. G. Eversole, Canadian patent No. 628,567, October 3, 1961.
9.
The analyses were performed by Crobaugh Laboratories, Cleveland, Ohio.
10.
11.
G. S.
Danil’chuk
, L. N.
Ganyuk
, A. E.
Koval’skii
, P. P.
Pogoretakii
, G. A.
Podzyarei
, and L. A.
Shul’man
, Theor. Exper. Chem.
1
, 237
(1965
).12.
13.
J. C. Angus, Deposition of Carbon on Diamond Seed Crystals, Air Force Cambridge Research Laboratories Report 66‐107, AD‐630‐705, Jan. 31, 1966.
14.
W. Stanko, M. S. thesis, Case Institute of Technology, June, 1966.
Also see Air Force Cambridge Research Laboratories Rept. 66‐499, AD‐636‐643, July 5, 1966.
15.
K. Heddon, Proceedings of the Fifth Conference on Carbon (Pergamon Press, Inc., New York, 1962), pp. 125–131.
This content is only available via PDF.
© 1968 The American Institute of Physics.
1968
The American Institute of Physics
You do not currently have access to this content.
