The Structure and Mechanical Properties of High-Strength Bulk Ultrafine-Grained Cobalt Prepared Using High-Energy Ball Milling in Combination with Spark Plasma Sintering

0463330 - ÚFP 2017 RIV CH eng J - Článek v odborném periodiku
Marek, I. - Vojtěch, D. - Michalcová, A. - Kubatík, Tomáš František
The Structure and Mechanical Properties of High-Strength Bulk Ultrafine-Grained Cobalt Prepared Using High-Energy Ball Milling in Combination with Spark Plasma Sintering.
Materials. Roč. 9, č. 5 (2016), č. článku 391. E-ISSN 1996-1944
Institucionální podpora: RVO:61389021
Klíčová slova: ultrafine-grained material * cobalt * ball milling * spark plasma sintering * mechanical properties
Kód oboru RIV: JG - Hutnictví, kovové materiály
Impakt faktor: 2.654, rok: 2016
www.mdpi.com/1996-1944/9/5/391/pdf

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.
Trvalý link: http://hdl.handle.net/11104/0262544