Diamond crystals deposited from interacting jets

Aleksey Rebrov, Aleksey Emelyanov, Sergey Kosolobov, Ivan Yudin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper describes the advancement of hot wire or hot filament CVD methods of diamond synthesis through the use high velocity gas flow activation by multiple collisions with a lengthy hot surface instead of activation by single collisions with hot wires. The possibility of synthesis of diamond crystals from a neutral gas with a high growth rate and a future solution of engineering scaling problems promise that this method will become competitive with others. Interacting jets of hydrogen and mixture of hydrogen with methane were used to synthesize diamond crystals on a molybdenum substrate. The growth rate of crystals about 20 μm/h was attained, which is much higher than in the case of a hot filament CVD. The increase of CH4 concentration essentially increases the diamond crystal growth rate. Depending on local conditions of the interaction of jets with substrates in different points, a completely different morphology of deposit is observed: from a compact film to isolated coarse crystals mostly icosahedral form.

Original languageEnglish
Pages (from-to)931-933
Number of pages3
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume12
Issue number7
DOIs
Publication statusPublished - 1 Jul 2015
Externally publishedYes

Keywords

  • Diamond deposition
  • Multiple collision activation H<inf>2</inf>+CH<inf>4</inf>

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