Mechanical and magnetic properties of spark plasma sintered soft magnetic FeCo alloy reinforced by carbon nanotubes

Albaaji, Amar ORCID: https://orcid.org/0000-0002-3551-5974, Castle, Elinor G., Reece, Mike J., Hall, Jeremy Peter ORCID: https://orcid.org/0000-0003-2737-9009 and Evans, Samuel Lewin ORCID: https://orcid.org/0000-0003-3664-2569 2016. Mechanical and magnetic properties of spark plasma sintered soft magnetic FeCo alloy reinforced by carbon nanotubes. Journal of Materials Research 31 (21) , 3448 -3458. 10.1557/jmr.2016.372

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Abstract

Different volume fractions (0.5 vol. % to 4.5 vol. %) of CNTs were used to reinforce a binary Fe50Co soft magnetic alloy. The first method for dispersion was involved dry mixing and ball milling of the powder, while the second was included wet mixing in dimethylformamide under ultrasonic agitation, drying and then dry ball milling. The powders were consolidated using spark plasma sintering. Tensile test and SEM analyses were performed to characterize the mechanical properties and the fracture surface of the sintered materials. The best magnetic and mechanical properties were achieved using the first method. A maximum enhancement in tensile strength of around 20% was observed in the 0.5 vol. % CNT composite with improved elongation compared to the monolithic Fe50Co alloy. In addition, the magnetic properties were enhanced by adding CNTs up to 1 vol. %, and an improvement in densification was observed in composites up to 1.5 vol. % CNT with respect to monolithic Fe50Co alloy.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	Carbon nanotubes, Spark plasma sintering, soft magnetic
Publisher:	Cambridge University Press
ISSN:	0884-2914
Date of First Compliant Deposit:	20 October 2016
Date of Acceptance:	16 September 2016
Last Modified:	23 Nov 2024 17:30
URI:	https://orca.cardiff.ac.uk/id/eprint/95503

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