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Imaging individual solute atoms at crystalline imperfections in metals

التفاصيل البيبلوغرافية
العنوان: Imaging individual solute atoms at crystalline imperfections in metals
المؤلفون: Shyam Katnagallu, Leigh T Stephenson, Isabelle Mouton, Christoph Freysoldt, Aparna P A Subramanyam, Jan Jenke, Alvin N Ladines, Steffen Neumeier, Thomas Hammerschmidt, Ralf Drautz, Jörg Neugebauer, François Vurpillot, Dierk Raabe, Baptiste Gault
المصدر: New Journal of Physics, Vol 21, Iss 12, p 123020 (2019)
بيانات النشر: IOP Publishing, 2019.
سنة النشر: 2019
المجموعة: LCC:Science
LCC:Physics
مصطلحات موضوعية: analytical-field ion microscopy, time-of-flight mass-spectroscopy, atomic resolution, dislocation segregation, density functional theory, Science, Physics, QC1-999
الوصف: Directly imaging all atoms constituting a material and, maybe more importantly, crystalline defects that dictate materials’ properties, remains a formidable challenge. Here, we propose a new approach to chemistry-sensitive field-ion microscopy (FIM) combining FIM with time-of-flight mass-spectrometry ( tof-ms ). Elemental identification and correlation to FIM images enabled by data mining of combined tof-ms delivers a truly analytical-FIM (A-FIM). Contrast variations due to different chemistries is also interpreted from density-functional theory (DFT). A-FIM has true atomic resolution and we demonstrate how the technique can reveal the presence of individual solute atoms at specific positions in the microstructure. The performance of this new technique is showcased in revealing individual Re atoms at crystalline defects formed in Ni–Re binary alloy during creep deformation. The atomistic details offered by A-FIM allowed us to directly compare our results with simulations, and to tackle a long-standing question of how Re extends lifetime of Ni-based superalloys in service at high-temperature.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1367-2630
Relation: https://doaj.org/toc/1367-2630
DOI: 10.1088/1367-2630/ab5cc4
URL الوصول: https://doaj.org/article/6d379535708c44b6b0a2967af827393b
رقم الأكسشن: edsdoj.6d379535708c44b6b0a2967af827393b
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/ab5cc4