2009年
First principles calculations of advanced nitrides, oxides and alloys
Key Engineering Materials
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- 巻
- 403
- 号
- 開始ページ
- 73
- 終了ページ
- 76
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.4028/3-908454-00-X.73
- 出版者・発行元
- Trans Tech Publications
The phase stability of silicon nitride is examined using a series of first principles phonon calculations, α-phase shows slightly higher free energy than β in the temperature range from 0 to 2000K. The difference between α and β is only 0.02 eV/Si3N4 or 2 kJ/mol at 300 K. The result is consistent with the experimental report by high-temperature oxide-melt-drop solution-calorimetry. Similar calculations are made for ZrO2, Ga2O3, BN and some perovskites. Using cluster expansion technique combined with a large set of first principles calculations, the cation disordering of II-III spinel oxides and the phase diagram of diamond vs. c-BN are theoretically investigated. Theoretical results on the atomic structures of β and γ sialons are also shown.
- ID情報
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- DOI : 10.4028/3-908454-00-X.73
- ISSN : 1013-9826
- SCOPUS ID : 58849158403