CoNiVベースの合金における冷凍特性に対する二次スケールの化学順序付け
Tiwen Lu1, Binhan Sun1, Yue Li2
1Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, China.
Nature
|August 27, 2025
まとめ
二重スケールの原子順序を持つ金属合金は,冷凍温度で強化された強度と柔らかさを示します. この新しいナノ構造は 変位行動を管理することによって 低温アプリケーションでの機械的性能を改善します
科学分野:
- 材料科学
- 金属工学
- ナノテクノロジー
背景:
- 金属材料の機械的性質は 低温で劣化し 低温のインフラに挑戦します
- 低温環境での耐久性や柔らかさを高める材料の開発は 極めて重要です
研究 の 目的:
- CoNiVベースの合金で二重スケールの原子配列ナノ構造を導入する.
- 低温で金属材料の強さと柔らかさの相乗効果を高めるため
主な方法:
- 二重スケールの原子配列のナノ構造を持つCoNiVベースの合金の製造.
- サブナノスケールの短距離オーダーリングとナノスケールの長距離オーダーリングドメイン密度の特徴.
- 冷凍温度 (87 K) での機械試験
主要な成果:
- オーダーリング誘発による 変位切断ストレスとより急速な変位増殖を観察した.
- 76 GPa-%の強度延伸分数と87 Kで約1.2 GPaの収縮強度を示した.
- ダブルスケールのオーダーリングは この階層構造を欠いた材料を上回りました
結論:
- 二重の共存する化学順序は,低温での複雑な合金の機械特性に大きな影響を及ぼします.
- これらのオーダー状態の制御は,冷凍アプリケーションの材料性能を向上させるための経路を提供します.
- 開発されたナノ構造は,厳しい冷凍環境の有望な解決策を提供します.
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