材料科学. 材料科学. 材料科学. 材料科学. 材料科学. 材料科学. 材料科学. 多層グラフェンのダイナミックな機械的振る舞いは,超音速射撃弾の貫通によるものです
Jae-Hwang Lee1, Phillip E Loya2, Jun Lou2
1Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA. Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003, USA. leejh@umass.edu elt@rice.edu.
Science (New York, N.Y.)
|November 29, 2014
まとめ
多層グラフェンは,高速衝突下での驚くべき強度を示し,鋼鉄よりもはるかに優れた浸透耐性を有しています. この研究は,新しい弾道的試験方法を使用して,そのダイナミックな機械的性質を明らかにします.
科学分野:
- マテリアルサイエンス 材料科学
- 機械工学の機械工学
- ナノテクノロジー ナノテクノロジー
背景:
- 多層グラフェンは2Dの炭素格子材料で,アニゾトロプ的特性で知られています.
- 以前の研究は,グラフェンの準静的機械的行動に焦点を当てていた.
- 多層グラフェンのダイナミックな機械的性質は,ほとんど未知のままである.
研究 の 目的:
- 多層グラフェンの高張力率の機械的振る舞いを調査するために.
- 材料が極端な動的条件に反応する様子を測定する.
- 従来の材料と比較して,その浸透抵抗を定量化するために.
主な方法:
- 多層グラフェンを研究するために,ミニチュア化された弾道テストを使用しました.
- 10ナノメートルから100ナノメートルまでの厚さでテストされたサンプル.
- 衝撃下でのクラックの発生と拡散パターンを分析した.
主要な成果:
- 結晶学的な方向に沿った放射性クラックの開始を観察した.
- 衝撃ゾーンを超えて,大きな外側の亀裂の広がりを示した.
- 600 m/sで測定された特定の貫通エネルギーは,鋼より約10倍高く,600 m/sで鋼より約10倍高い.
結論:
- 多層グラフェンは特殊なダイナミック強度と貫通抵抗性を有しています.
- 高いストレート率の下でのユニークなクラック伝播行動が強調されています.
- 発見は,高性能保護材料の潜在的な応用を示唆しています.
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