Solution growth of silicon carbide using unary chromium solvent

Ryo Miyasaka, Sakiko Kawanishi, Taka Narumi, Hideaki Sasaki, Takeshi Yoshikawa, Masafumi Maeda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Solution growth of silicon carbide (SiC) using unary chromium (Cr) solvent was studied because the system enables a high solubility difference and a low degree of supersaturation, which would lead to rapid growth with a stabilized growth interface. The liquidus composition at SiC saturation in a quasi-binary Cr–SiC system was studied at 1823–2173 K. The measured carbon (C) contents are in good agreement with the thermodynamic evaluation using the sub-regular solution model. In addition, growth experiments using a unary Cr solvent were performed by the bottom-seeded travelling solvent method. The obtained growth rates at 1803–1923 K with a temperature difference of 15–70 K were proportional to the solubility difference between the seed and source temperatures, indicating that the growth was controlled by the mass transfer of C in the solution. The maximum growth rate of 720 µm/h at 1803 K was much higher than the growth rate by Si-rich solvents, suggesting that the Cr-rich solvent is suitable for the rapid growth at a low temperature.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalJournal of Crystal Growth
Volume460
DOIs
Publication statusPublished - 2017 Feb 15
Externally publishedYes

Keywords

  • A1. Phase equilibria
  • A1. Solubility
  • A1. Supersaturation
  • A2. Solution growth
  • B2. SiC

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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