Atom probe study of B2 order and A2 disorder of the FeCo matrix in an Fe-Co-Mo-alloy
| Autor: | Harald Leitner, Sophie Primig, Christoph Turk, Helmut Clemens, Ingrid Schemmel |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Diffraction Materials science Condensed matter physics Alloy Intermetallic General Physics and Astronomy 02 engineering and technology Cell Biology Atom probe engineering.material 021001 nanoscience & nanotechnology 01 natural sciences law.invention Crystallography Ferromagnetism Structural Biology Transmission electron microscopy law 0103 physical sciences engineering General Materials Science 0210 nano-technology Field ion microscope Solid solution |
| Zdroj: | Micron (Oxford, England : 1993). 98 |
| ISSN: | 1878-4291 |
| Popis: | The physical and mechanical properties of intermetallic alloys can be tailored by controlling the degree of order of the solid solution by means of heat treatments. FeCo alloys with an appropriate composition exhibit an A2-disorder↔B2-order transition during continuous cooling from the disordered bcc region. The study of atomic order in intermetallic alloys by diffraction and its influence on the material properties is well established, however, investigating magnetic FeCo-based alloys by conventional methods such as X-ray diffraction is quite challenging. Thus, the imaging of ordered FeCo-nanostructures needs to be done with high resolution techniques. Transmission electron microscopy investigations of ordered FeCo domains are difficult, due to the chemical and physical similarity of Fe and Co atoms and the ferromagnetism of the samples. In this work it will be demonstrated, that the local atomic arrangement of ordered and disordered regions in an industrial Fe-Co-Mo alloy can be successfully imaged by atom probe measurements supported by field ion microscopy and transmission Kikuchi diffraction. Furthermore, a thorough atom probe parameter study will be presented and field evaporation artefacts as a function of crystallographic orientation in Fe-Co-samples will be discussed. |
| Databáze: | OpenAIRE |
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