Please use this identifier to cite or link to this item: doi:10.22028/D291-31918
Title: On the remarkable thermal stability of nanocrystalline cobalt via alloying
Author(s): Bachmaier, Andrea
Motz, Christian
Language: English
Title: Materials science & engineering. A
Volume: 624 (2015)
Pages: 41-51
Publisher/Platform: Elsevier
Year of Publication: 2014
Free key words: Nanostructured materials
Severe plastic deformation
Thermal stability
DDC notations: 500 Science
530 Physics
540 Chemistry
600 Technology
621.3 Electrical engineering, electronics
660 Chemical engineering
Publikation type: Journal Article
Abstract: Nanostructured Co materials are produced by severe plastic deformation via alloying with small amounts of C and larger amounts of Cu. The thermal stability of the different nanostructured Co materials is studied through isothermal annealing at different temperatures for various times and compared to the stability of severe plastically deformed high-purity nanocrystalline Co. The microstructural changes taking place during annealing are evaluated by scanning electron microscopy, transmission electron microscopy and microhardness measurements. In the present work it is shown that the least stable nanostructured material is the single-phase high purity Co. Alloying with C improves the thermal stability to a certain extent. A remarkable thermal stability is achieved by alloying Co with Cu resulting in stabilized nanostructures even after annealing for long times at high temperatures. The essential reason for the enhanced thermal stability is to be found in the immiscibility of both components of the alloy.
DOI of the first publication: 10.1016/j.msea.2014.11.062
Link to this record: urn:nbn:de:bsz:291--ds-319185
ISSN: 0921-5093
Date of registration: 18-Aug-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Christian Motz
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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