Počet záznamů: 1
Processing and Properties of Tungsten-Steel Composites and FGMs Prepared by Spark Plasma Sintering
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SYSNO ASEP 0567526 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Processing and Properties of Tungsten-Steel Composites and FGMs Prepared by Spark Plasma Sintering Tvůrce(i) Matějíček, Jiří (UFP-V) RID, ORCID
Mušálek, Radek (UFP-V) RID, ORCID
Dlabáček, Zdeněk (UFP-V)
Klevarová, Veronika (UFP-V)
Kocmanová, Lenka (UFP-V)Celkový počet autorů 5 Číslo článku 9037 Zdroj.dok. Materials. - : MDPI
Roč. 15, č. 24 (2022)Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova composites ; FGMs ; plasma facing components ; spark plasma sintering ; steel ; tungsten Vědní obor RIV JI - Kompozitní materiály Obor OECD Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics CEP GA17-23154S GA ČR - Grantová agentura ČR GB14-36566G GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000904439500001 EID SCOPUS 85144822163 DOI 10.3390/ma15249037 Anotace Tungsten is the prime candidate material for the plasma-facing components of fusion reactors. For the joining of tungsten armor to the cooling system or support structure, composites or graded interlayers can be used to reduce the stress concentration at the interface. These interlayers can be produced by several technologies. Among these, spark plasma sintering appears advantageous because of its ability to fabricate fully dense parts at lower temperatures and in a shorter time than traditional powder metallurgy techniques, thanks to the concurrent application of temperature, pressure, and electrical current. In this work, spark plasma sintering of tungsten-steel composites and functionally graded layers (FGMs) was investigated. As a first step, pure tungsten and steel powders of different sizes were sintered at a range of temperatures to find a suitable temperature window for fully dense compacts. Characterization of the sintered compacts included structure (by SEM), porosity (by the Archimedean method and image analysis), thermal diffusivity (by the flash method) and mechanical properties (microhardness and flexural strength). Compacts with practically full density and fine grains were obtained, while the temperature needed to achieve full sintering decreased with decreasing powder size (down to about 1500 °C for the 0.4 μm powder). For fully sintered compacts, the hardness and thermal diffusivity increased with decreasing powder size. Composites with selected tungsten/steel ratios were produced at several conditions and characterized. At temperatures of 1100 °C or above, intermetallic formation was observed in the composites, nevertheless, without a detrimental effect on the mechanical strength. Finally, the formation of graded layers and tungsten-steel joints in various configurations was demonstrated. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2023 Elektronická adresa https://www.mdpi.com/1996-1944/15/24/9037
Počet záznamů: 1