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Updated: Jun 4, 2026

05:04
Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
グラデントナノ粒子の銅の異常な固有の張力可塑性を明らかにしています
1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.
まとめ
ナノ粒度金属は,グラデントの粗粒度基板に閉じ込められたとき,柔らかくなります. この新しい構造は,高収量強度と,割れることなく100%以上の張力強度を達成し,高度なコーティングを可能にします.
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:
- ナノ粒度金属 (NG) は通常,強いが脆いので,その用途が限られている.
- フリースタンドのNG金属は,限られた張力均等伸長 (数パーセント) を示しています.
研究 の 目的:
- グラデント粗粒線 (CG) 銅基板内にNG銅膜を閉じ込めることで,張力可塑性を高めることができるかどうかを調査する.
- このような梯度構造における変形メカニズムを理解するために.
主な方法:
- グラデント粒子の大きさの移行によるCG銅基板上のNG銅膜の製造.
- 張力試験は,収力強さや伸縮などの機械的性質を評価するためのものです.
- 変形メカニズムを観察するための微細構造分析.
主要な成果:
- グラデントNGフィルムは,典型的なNG金属よりも10倍高い強度を達成しました.
- 構造は,CG基板に匹敵する張力可塑性を示し,割れることなく100%以上の真の張力を維持しました.
- プラスチックの変形は,機械的に駆動された穀物境界移動と穀物成長によって支配されていました.
結論:
- グラデーションCG構造でNGフィルムを封じ込めると,ストレスの局所化を効果的に抑制し,柔らかさを高めます.
- グラデントNG構造は,並外れた固有の可塑性を持ち,高度なコーティングに適しています.
- 粒子の境界移動は,これらのグラデントナノ構造材料で高い可塑性を達成するための重要なメカニズムです.
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