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Properties of Mechanically Alloyed W-Ti Materials with Dual Phase Particle Dispersion
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SYSNO ASEP 0474189 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Properties of Mechanically Alloyed W-Ti Materials with Dual Phase Particle Dispersion Author(s) Lukáč, František (UFP-V) ORCID
Vilémová, Monika (UFP-V) RID, ORCID
Nevrlá, Barbara (UFP-V) RID
Klečka, Jakub (UFP-V) ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Molnárová, O. (CZ)Article number 3 Source Title Metals. - : MDPI
Roč. 7, č. 1 (2017)Number of pages 10 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords tungsten-titanium alloys ; mechanical alloying ; particle dispersion ; pulsed electric current sintering ; thermal conductivity ; bending strength Subject RIV JJ - Other Materials OECD category Materials engineering R&D Projects GA15-15609S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000396509900003 EID SCOPUS 85009743259 DOI 10.3390/met7010003 Annotation In the presented study, we report on the preparation and properties of mechanically alloyed W-Ti powders compacted by pulsed electric current sintering. Four different powder compositions of W-(3%–7%)Ti with Hf or HfC were prepared. The alloys structure contains only high-melting-point phases, namely the W-Ti matrix, complex carbide (Ti,W,Hf)C and HfO2 particle dispersion, Ti in the form of a separate phase is not present. The bending strength of the alloys depends on the amount of Ti added. The addition of 3 wt. % Ti led to an increase whereas 7 wt. % Ti led to a major decrease in strength when compared to unalloyed tungsten sintered at similar conditions. The addition of Ti significantly lowered the room-temperature thermal conductivity of all prepared materials. However, unlike pure tungsten, the conductivity of the prepared alloys increased with the temperature. Thus, the thermal conductivity of the alloys at 1300 °C approached the value of the unalloyed tungsten. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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