Mo-フリースチール・アトム・プローブ・トモグラフィー・ボリュームにおける驚くべきC行動
William Mottay1, Jeremy Landes1,2, Alain Portavoce1
1CNRS, IM2NP, Aix Marseille Université, Campus de Saint-Jérôme, Avenue Escadrille Normandie Niemen, Case 142, Marseille 13397, France.
まとめ
鋼の変位における炭素分離は,モリブデンの共分離でのみ観察される. この研究では,原子探査用トモグラフィー (APT) は,分析中にサンプルを残す変位のために鉄の炭素を不正確に測定することが示唆されています.
科学分野:
- 材料科学
- 金属工学
- 分析化学
背景:
- 原子探査用トモグラフィー (APT) は,結晶欠陥における溶液原子分離を分析するための重要な技術である.
- 工業用鋼の溶液分離を理解することは,材料の特性と性能にとって極めて重要です.
研究 の 目的:
- APTを用いて工業用鋼の変位における炭素 (C) 分離の予期せぬ観測を調査する.
- 他の元素,特にモリブデン (Mo) のC分離への影響を決定する.
- 特定の条件下で鉄中の炭素のAPT測定の精度を評価する.
主な方法:
- 原子探査トモグラフィー (APT) は,鋼のサンプルにおける溶液原子の分布を分析するために使用されました.
- 伝送電子顕微鏡 (TEM) がAPTの相関分析に使用された.
- モリブデンフリー鋼のAPT量における炭素組成の統計的分析が行われた.
主要な成果:
- 脱位における炭素分離は,モリブデンの共分離の存在においてのみ観察された.
- モリブデンなしの鋼材では,APTの35%は,固体溶液中の炭素含有量が予想より5倍高かった.
- 関連TEM-APT分析は,モリブデンなしの変位で炭素分離がないことを確認した.
結論:
- 鉄の変位における炭素分離の原子探査トモグラフィーの測定は不正確である可能性があります.
- APTで使用される高い電場は,試料を離れるため,誤った炭素測定につながる可能性があります.
- モリブデンは,APT分析の際の脱位で観測された炭素分離において重要な役割を果たします.
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