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The Structure and Mechanical Properties of High-Strength Bulk Ultrafine-Grained Cobalt Prepared Using High-Energy Ball Milling in Combination with Spark Plasma Sintering
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SYSNO ASEP 0463330 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Structure and Mechanical Properties of High-Strength Bulk Ultrafine-Grained Cobalt Prepared Using High-Energy Ball Milling in Combination with Spark Plasma Sintering Author(s) Marek, I. (CZ)
Vojtěch, D. (CZ)
Michalcová, A. (CZ)
Kubatík, Tomáš František (UFP-V)Article number 391 Source Title Materials. - : MDPI
Roč. 9, č. 5 (2016)Number of pages 10 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords ultrafine-grained material ; cobalt ; ball milling ; spark plasma sintering ; mechanical properties Subject RIV JG - Metallurgy Institutional support UFP-V - RVO:61389021 UT WOS 000378628500086 EID SCOPUS 84970046449 DOI 10.3390/ma9050391 Annotation In this study, bulk ultrafine-grained and micro-crystalline cobalt was prepared using a combination of high-energy ball milling and subsequent spark plasma sintering. The average grain sizes of the ultrafine-grained and micro-crystalline materials were 200 nm and 1 micro m, respectively. Mechanical properties such as the compressive yield strength, the ultimate compressive strength,
the maximum compressive deformation and the Vickers hardness were studied and compared with those of a coarse-grained as-cast cobalt reference sample. The bulk ultrafine-grained sample showed an ultra-high compressive yield strength that was greater than 1 GPa, which is discussed with respect to the preparation technique and a structural investigation.Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2017
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