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METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS
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SYSNO ASEP 0485071 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS Tvůrce(i) Barták, Tomáš (UFM-A)
Kuchařová, Květa (UFM-A) RID, ORCID
Záležák, Tomáš (UFM-A) RID, ORCID
Dlouhý, Antonín (UFM-A) RID, ORCIDCelkový počet autorů 4 Zdroj.dok. METAL 2010: 19TH INTERNATIONAL METALLURGICAL AND MATERIALS CONFERENCE. - Ostrava : TANGER LTD, 2010 - ISBN 978-80-87294-17-8 Rozsah stran s. 818-821 Poč.str. 4 s. Forma vydání Online - E Akce International Conference on Metallurgy and Materials METAL 2010 /19th./ Datum konání 18.05.2010-20.05.2010 Místo konání Rožnov pod Radhoštěm Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova reinforced aluminum-alloys ; mechanical-properties ; creep ; vim ; intermetallic ; re-melting Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP GA202/09/2073 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000286658700141 Anotace A NiAl-Mo eutectic alloy was melt from 99,99% purity components and cast by the drop casting technique. The drop-cast ternary alloy (nominal composition of Ni-45Al-9Mo at. %), was re-melted and directionally solidified using a high temperature optical floating zone furnace. A resulting in-situ composite consists of Ni-45,2Al matrix and Mo-10Al-4Ni fibers, all in at. %. The volume fraction of 14% Mo-fibers stems from the eutectic composition. Spacing and a diameter of Mo-fibers can be controlled within certain limits using different growth rates of the crystals. Microstructural parameters of the as-cast crystals were assessed by light microscopy, scanning and transmission electron microscopy. Backscatter diffraction shows that the NiAl-matrix and the Mo-fibers are both 001 -oriented with respect to the axis of the cylindrical rods. Preliminary creep experiments confirmed an immense improvement of high temperature strength due to the fine distribution of Mo-fibres. The amount of strengthening in terms of minimum creep rate can be as high as 7 orders of magnitude. Post-mortem transmission electron microscopy experiments provided evidence that creep in the temperature range of 800-900 degrees C results in an extensive formation of subgrain boundaries. The strengthening effect is very likely associated with the reactions between subgrain boundaries and fine Mo-fibres. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2018
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