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Metals 2017, 7(1), 3; doi:10.3390/met7010003

Properties of Mechanically Alloyed W-Ti Materials with Dual Phase Particle Dispersion

1
Institute of Plasma Physics, Czech Academy of Science, Za Slovankou 3, 18200 Prague, Czech Republic
2
Mathematics and Physics Faculty, Charles University, Ke Karlovu 3, 12116 Prague, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editor: Chun-Liang Chen
Received: 31 October 2016 / Revised: 13 December 2016 / Accepted: 20 December 2016 / Published: 26 December 2016
(This article belongs to the Special Issue Mechanical Alloying)
View Full-Text   |   Download PDF [3781 KB, uploaded 26 December 2016]   |  

Abstract

W alloys are currently widely studied materials for their potential application in future fusion reactors. 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. View Full-Text
Keywords: tungsten-titanium alloys; mechanical alloying; particle dispersion; pulsed electric current sintering; thermal conductivity; bending strength tungsten-titanium alloys; mechanical alloying; particle dispersion; pulsed electric current sintering; thermal conductivity; bending strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lukáč, F.; Vilémová, M.; Nevrlá, B.; Klečka, J.; Chráska, T.; Molnárová, O. Properties of Mechanically Alloyed W-Ti Materials with Dual Phase Particle Dispersion. Metals 2017, 7, 3.

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