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Powder-metallurgy preparation of NiTi shape-memory alloy using mechanical alloying and spark-plasma sintering.
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SYSNO ASEP 0479483 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Powder-metallurgy preparation of NiTi shape-memory alloy using mechanical alloying and spark-plasma sintering. Author(s) Novák, P. (CZ)
Moravec, H. (CZ)
Vojtěch, V. (CZ)
Knaislová, A. (CZ)
Školáková, A. (CZ)
Kubatík, Tomáš František (UFP-V)
Kopeček, Jaromír (FZU-D) RID, ORCIDSource Title Materiali in Tehnologije. - : Institut za Kovinske Materiale in Tehnologije - ISSN 1580-2949
Roč. 51, č. 1 (2017), s. 141-144Number of pages 4 s. Publication form Print - P Language eng - English Country SI - Slovenia Keywords mechanical alloying ; spark plasma sintering ; NiTi ; shape memory alloy Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Physics - Metallurgy R&D Projects GA14-03044S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 ; FZU-D - RVO:68378271 UT WOS 000396592900022 EID SCOPUS 85027448989 DOI 10.17222/mit.2016.011 Annotation In this work a combination of mechanical alloying and spark-plasma sintering was tested as a promising route for the preparation of a nanocrystalline NiTi shape-memory alloy. The mechanism of mechanical alloying was investigated. Results revealed that the Ti2Ni phase forms preferentially, being followed by the NiTi phase (austenite B2 structure) and a small amount of Ni3Ti. During spark-plasma sintering, only minor changes occurred in the phase composition, i.e., precipitation of the Ni4Ti3 phase and the partial transformation of NiTi to monoclinic martensite. The selected technology leads to a very high compression strength (approx. 2300 MPa), but also high brittleness. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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