Properties of Ultrafine-Grained Tungsten Prepared by Ball Milling and Spark Plasma Sintering

0451227 - ÚFP 2016 RIV CH eng C - Conference Paper (international conference)
Vilémová, Monika - Nevrlá, Barbara - Pala, Zdeněk - Kocmanová, Lenka - Janata, Marek - Matějíček, Jiří - Tonarová, Dana
Properties of Ultrafine-Grained Tungsten Prepared by Ball Milling and Spark Plasma Sintering.
Applied Mechanics and Materials. Vol. 821. Zürich: Trans Tech Publications Inc, 2016 - (Fischer, C.), s. 399-404. Engineering Mechanics, 821. ISBN 978-3-03835-700-1. ISSN 1660-9336.
[Engineering Mechanics 2015, International conference engineering mechanics 2015/21./. Svratka (CZ), 11.05.2015-14.05.2015]
R&D Projects: GA ČR(CZ) GA14-12837S
Institutional support: RVO:61389021
Keywords : ultrafine-grained tungsten * planetary ball milling * spark plasma sintering
Subject RIV: JJ - Other Materials

Tungsten is a candidate material for the first wall of a nuclear fusion reactor. First wall will be subjected to harsh conditions that will gradually deteriorate properties of the wall material. Some studies point out that fine-grained tungsten could be more resistant to the structure and property changes than coarse-grained tungsten. In this study, preparation of ultrafine-grained tungsten by mechanical processing in a planetary ball mill was examined. Three types of tungsten samples were compared. One was made from coarse grained tungsten powder consolidated by SPS (Spark Plasma Sintering). Other two samples were prepared from the powder processed in a planetary ball mill with and without addition of Y2O3. After ball milling, the powders were consolidated by SPS. Properties of the samples such as hardness and thermal conductivity were examined and correlated with the processing history and microstructure.
Permanent Link: http://hdl.handle.net/11104/0252392