Considerations of thermodynamics on diamond formation by low pressure vapor synthesis

Toshiaki Ueda, Kushiro Mukai, Takashi Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Diamonds were formed on the silicon substrate attached to the water-cooled copper or stainless steel block using an acetylene- oxygen combustion flame method for the range of the gas composition ration R(C2H2(vol%)/O2(vol%)) between 1.1 and 2.4. Thermodynamic calculation of gaseous concentrations in the acetylene feather is consistent with the equilibrium state. The larger the vertical temperature gradient of silicon substrate, the smaller is the value of the gas composition ratio R in which diamond can form. It may be considered that the activated carbon species are rapidly quenched on the substrate surface due to the large vertical temperature gradient, which leads to the formation of diamond.

Original languageEnglish
Title of host publicationFirst International Conference on Processing Materials for Properties
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages1153-1156
Number of pages4
ISBN (Print)0873392566
Publication statusPublished - 1993 Dec 1
EventProceedings of the 1st International Conference on Processing Materials for Properties - Honolulu, HI, USA
Duration: 1993 Nov 71993 Nov 10

Publication series

NameFirst International Conference on Processing Materials for Properties

Other

OtherProceedings of the 1st International Conference on Processing Materials for Properties
CityHonolulu, HI, USA
Period93/11/793/11/10

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Considerations of thermodynamics on diamond formation by low pressure vapor synthesis'. Together they form a unique fingerprint.

  • Cite this

    Ueda, T., Mukai, K., & Nakamura, T. (1993). Considerations of thermodynamics on diamond formation by low pressure vapor synthesis. In First International Conference on Processing Materials for Properties (pp. 1153-1156). (First International Conference on Processing Materials for Properties). Publ by Minerals, Metals & Materials Soc (TMS).