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Effect of ball-milling time on mechanical and magnetic properties of carbon nanotube reinforced FeCo alloy composites

Albaaji, Amar J. ORCID: https://orcid.org/0000-0002-3551-5974, Castle, Elinor G., Reece, Mike J., Hall, Jeremy P. ORCID: https://orcid.org/0000-0003-2737-9009 and Evans, Samuel L. ORCID: https://orcid.org/0000-0003-3664-2569 2017. Effect of ball-milling time on mechanical and magnetic properties of carbon nanotube reinforced FeCo alloy composites. Materials & Design 122 , pp. 296-306. 10.1016/j.matdes.2017.02.091

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Abstract

Carbon nanotubes (CNTs) reinforced FeCo alloys were produced by high energy ball-milling and spark plasma sintering (SPS). CNTs distribution in the FeCo alloy was gradually improved as ball-milling time increased, with a uniform dispersion achieved after 6 h ball-milling. Tensile tests demonstrated that, as the ball-milling time increased, the yield strength increased in the composites; a maximum 50% relative increase in tensile strength due to the addition of CNTs was achieved after 1 h ball-milling, which then decreased with further ball-milling. The elongation to fracture was significantly increased after 1 h ball-milling and then decreased with further ball-milling. SEM results show a patch of dimples in the fracture surface of the composite, indicating improved ductility due to CNTs. The coercivity was increased with increased ball-milling time, while the saturation induction showed a peak value after 1 h of ball-milling and then decreased with further ball-milling. Raman spectra of the composite indicated that no serious damage had been imparted to the CNTs during ball-milling.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Uncontrolled Keywords: Ball milling; Carbon nanotube; Spark plasma sintering
Publisher: Elsevier
ISSN: 0264-1275
Date of First Compliant Deposit: 10 August 2017
Date of Acceptance: 28 February 2017
Last Modified: 07 Nov 2023 17:54
URI: https://orca.cardiff.ac.uk/id/eprint/102932

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