The relationship between the initial gas ratios and the condensed phase composition in the CVD of BxC with CH4-H2 precursors

Juan Li Deng, Lai Fei Cheng, Li Ning Gao, Ke He Su

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

For the preparation of the self-healing phase BxC with BC 3-CH4-H2 precursors, the production has been examined as a function of the initial gas ratios of BCl3(BCl 3+CH4) and H2(BCl3+CH4) at given temperature and pressure. The results show that the composition of the condensed phase is quite sensitive to the molar ratio of BCl 3(BCl3+CH4) and H2(BCl 3+CH4). The ideal condition for the deposition of B xC is that the ratio of BCl3(BCl3+CH 4) is 0.8 and the H2(BCl3+CH4) ratio ranges from 10 to 105.2. The carbon or boron-rich material is mainly controlled by the ratios of BCl3(BCl3+CH4) and H2(BCl3+CH4). The deposition condition of carbon-rich phase should be in low BCl3(BCl3+CH 4) (0.0∼0.8) and H2(BCl3+CH4) (10-2<102) ratios, whereas that of the boron-rich phase needs high BCl3(BCl3+CH4) (0.8∼1.0) and H2(BCl3+CH4) (104∼10 5) ratios.

Original languageEnglish
Title of host publicationAdvanced Materials
Pages1761-1765
Number of pages5
DOIs
StatePublished - 2011
Event2011 International Conference on Chemical Engineering and Advanced Materials, CEAM 2011 - Changsha, China
Duration: 28 May 201130 May 2011

Publication series

NameAdvanced Materials Research
Volume239-242
ISSN (Print)1022-6680

Conference

Conference2011 International Conference on Chemical Engineering and Advanced Materials, CEAM 2011
Country/TerritoryChina
CityChangsha
Period28/05/1130/05/11

Keywords

  • Boron carbide
  • Condensed phase
  • CVD
  • Deposition condition
  • Thermodynamics

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