Browsing by Author "Keller Vojtěch"
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- ItemCorrosion Resistance of Alloys on Basis of Cobalt in Sodium-calcium Molten Glass(Technická univerzita v Liberci, 2018) Hotař Adam; Zýka Jiří; Hotař Vlastimil; Keller Vojtěch
- ItemCorrosion Resistance of Nickel and Cobalt Alloys in Molten Soda-lime Glass at temperature 1200 °C(Česká sklářská společnost, 2019) Hotař Adam; Zýka Jiří; Hotař Vlastimil; Keller Vojtěch
- ItemThe Effect of Chromium Addition And Heat Treatment on Phase Composition of Cast FeAlSi Alloys(J. E. Purkyne University in Usti nad Labem, 2018) Švec Martin; Vodičková Věra; Keller Vojtěch; Hanus Pavel
- ItemThe Effect of Heat Treatment on the Structure And High - Temperature Strength of Fe3Al - Based Iron Aluminide Doped by Carbona nd Carbide-forming Element(Institute of Physics Publishing, 2020) Vodičková Věra; Hanus Pavel; Keller Vojtěch; Švec MartinA structural study as well as the determination of σ0.2 compression yield stress at high temperatures have been performed on the Fe3Al-based iron aluminide doped by Nb (5 at. %) and C (1.5 at. %). The carbon occurrence leads to the formation of three-phase structure. Fe3Al matrix, niobium carbides and (Fe, Al)2Nb Laves phase were observed in the structure of investigated alloys. Precipitates were inhomogeneously distributed in as cast state alloy. The annealing at 1000 °C for 50 hrs. leads to more homogenously distribution of secondary phase particles and also to refinement of grain size. The strengthening mechanism of material at high temperatures was detected as a combination of strengthening by incoherent precipitates (NbC and Laves phase) and a solid solution hardening by Nb atoms. Effect of two reinforcing mechanisms together with homogeneously precipitate's distribution increase the values of σ0.2 compression yield stress about 50 MPa in whole measured temperature range (600 – 800 °C) in comparison to similar intermetallic's system Fe-Al-Zr-C. Phase composition of the alloy was studied by means of scanning electron microscopy (SEM) equipped by energy dispersive X-ray spectrometer (EDX). The electron backscattered diffraction (EBSD) was used for phase verification and grain size visualization.
- ItemThe effect of simultaneous Si and Ti/Mo alloying on high-temperature strength of Fe3Al-based Iron Aluminides(MDPI AG, 2020) Vodičková Věra; Švec Martin; Hanus Pavel; Novák Pavel; Záděra Antonín; Pazourková Prokopčáková Petra; Keller Vojtěch
- ItemThe Influence of Secondary Phase on Impact Toughness of Alloyed Iron Aluminides(Trans Tech Publications Inc., 2020) Švec Martin; Hotař Adam; Vodičková Věra; Keller Vojtěch
- ItemThe Microstructure Evolution of Fe-28Al-15Si-0.2Zr Alloy during Different Heat-Treatment(Trans Tech Publications Inc., 2020) Vodičková Věra; Švec Martin; Hanus Pavel; Keller Vojtěch