書誌事項
- タイトル別名
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- Evaluation of Mechanical Properties and Negative Poisson's Ratio Behavior in Crystalline SiO2 Materials: An Atomistic Approach
- ゲンシロンテキ アプローチ ニ ヨル SiO2 ケッショウ ザイリョウ ノ キカイテキ トクセイ ト フ ノ ポアソンヒ ノ キョドウ ノ ヒョウカ
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説明
The structural changes with volume expansion in low-temperature (a) phases of quartz and cristobalite, the typical polymorphs of silicon dioxide (SiO2), have been studied through first-principles calculations using the projector-augmented-wave (PAW) method, with particular emphasis on their negative Poisson's ratio behavior. The dominant mechanism of expansion is the increase of the Si-O-Si angles within their crystalline structures, whereas the SiO4 tetrahedron undergoes only a slight distortion. We provide theoretical ab initio results for a complete set of independent elastic constants of quartz and cristobalite with volume expansion. For comparison, the adiabatic elastic constants of both polymorphs are evaluated at finite temperatures, using the molecular-dynamics simulations with a nonempirical pairwise potential. Our calculated elastic properties are found to be in good agreement with the experimental data.
収録刊行物
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- 日本機械学会論文集A編
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日本機械学会論文集A編 72 (718), 823-829, 2006
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282679455200256
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- NII論文ID
- 110004741179
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- NII書誌ID
- AN0018742X
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- COI
- 1:CAS:528:DC%2BD28XovFyqsLg%3D
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- ISSN
- 18848338
- 03875008
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- NDL書誌ID
- 8011158
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可