Publication result detail
High-energy ball milling and spark plasma sintering of molybdenum - lanthanum oxide (Mo-La2O3) and molybdenum - lanthanum zirconate (Mo-La2Zr2O7) composite powders
ČELKO, L.; TKACHENKO, S.; CASAS LUNA, M.; DYČKOVÁ, L.; BEDNAŘÍKOVÁ, V.; REMEŠOVÁ, M.; KOMAROV, P.; DEÁK, A.; BALÁŽ, M.; CRAWFORD, D.; DÍAZ DE LA TORRE, S.; BODOKI, E.; CIHLÁŘ, J.
Original Title
High-energy ball milling and spark plasma sintering of molybdenum - lanthanum oxide (Mo-La2O3) and molybdenum - lanthanum zirconate (Mo-La2Zr2O7) composite powders
English Title
High-energy ball milling and spark plasma sintering of molybdenum - lanthanum oxide (Mo-La2O3) and molybdenum - lanthanum zirconate (Mo-La2Zr2O7) composite powders
Type
WoS Article
Original Abstract
The current study is focused on the preparation of Mo-10 vol%La2O3 and Mo-10 vol% La2Zr2O7 composite powders via low- and high-energy ball milling approaches as potential candidates for near-future high-temperature structural applications. The mechanical milling parameters play a critical role on the final powder's microstructure. When using the high-energy milling mode (using 800 rpm, ball-to-powder ratio (BPR) 100: 6), the homogeneous powder agglomerates are formed with refined laminated microstructure and more uniform ceramic phase distribution in both Mo-La2O3 and Mo-La2Zr2O7 systems compared to the powders produced by means of the low-energy milling mode (using 350 rpm, BPR 100: 6), where inhomogeneous powder mixture with less embedding of ceramic phases into Mo agglomerates was obtained. This study also focuses on the evaluation of high-temperature phase and microstructural stability of the produced composite powders treated at the temperature of 1300 degrees C under the different gaseous environments, including ambient, inert and reducing atmospheres. The Mo-10 vol% La2Zr2O7 composite powder exhibited better thermal stability during the high-temperature exposure in all tested atmospheres in comparison with the Mo-La2O3 composite powder, since it revealed less intensive formation of the intermediate phases, such as lanthanum oxymolybdates. Therefore, the Mo-10 vol%La2Zr2O7 composite powder was used further for consolidation by means of spark plasma sintering at 1600 degrees C. The successful production of Mo-La2Zr2O7 composite with homogeneous distribution of ceramic phase, the grain size about of 5 mu m, and hardness of 3.4 GPa was not reported so far.
English abstract
The current study is focused on the preparation of Mo-10 vol%La2O3 and Mo-10 vol% La2Zr2O7 composite powders via low- and high-energy ball milling approaches as potential candidates for near-future high-temperature structural applications. The mechanical milling parameters play a critical role on the final powder's microstructure. When using the high-energy milling mode (using 800 rpm, ball-to-powder ratio (BPR) 100: 6), the homogeneous powder agglomerates are formed with refined laminated microstructure and more uniform ceramic phase distribution in both Mo-La2O3 and Mo-La2Zr2O7 systems compared to the powders produced by means of the low-energy milling mode (using 350 rpm, BPR 100: 6), where inhomogeneous powder mixture with less embedding of ceramic phases into Mo agglomerates was obtained. This study also focuses on the evaluation of high-temperature phase and microstructural stability of the produced composite powders treated at the temperature of 1300 degrees C under the different gaseous environments, including ambient, inert and reducing atmospheres. The Mo-10 vol% La2Zr2O7 composite powder exhibited better thermal stability during the high-temperature exposure in all tested atmospheres in comparison with the Mo-La2O3 composite powder, since it revealed less intensive formation of the intermediate phases, such as lanthanum oxymolybdates. Therefore, the Mo-10 vol%La2Zr2O7 composite powder was used further for consolidation by means of spark plasma sintering at 1600 degrees C. The successful production of Mo-La2Zr2O7 composite with homogeneous distribution of ceramic phase, the grain size about of 5 mu m, and hardness of 3.4 GPa was not reported so far.
Keywords
Molybdenum; Lanthanum oxide; Lanthanum zirconium oxide; High-energy milling; Thermal stability; Spark plasma sintering
Key words in English
Molybdenum; Lanthanum oxide; Lanthanum zirconium oxide; High-energy milling; Thermal stability; Spark plasma sintering
Authors
ČELKO, L.; TKACHENKO, S.; CASAS LUNA, M.; DYČKOVÁ, L.; BEDNAŘÍKOVÁ, V.; REMEŠOVÁ, M.; KOMAROV, P.; DEÁK, A.; BALÁŽ, M.; CRAWFORD, D.; DÍAZ DE LA TORRE, S.; BODOKI, E.; CIHLÁŘ, J.
RIV year
2022
Released
01.01.2022
Publisher
Elsevier
Location
OXFORD
ISBN
0263-4368
Periodical
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume
102
Number
1
State
United Kingdom of Great Britain and Northern Ireland
Pages from
1
Pages to
13
Pages count
13
URL
Full text in the Digital Library
BibTex
@article{BUT176090,
author="Ladislav {Čelko} and Serhii {Tkachenko} and Mariano {Casas Luna} and Lucie {Dyčková} and Vendula {Bednaříková} and Michaela {Remešová} and Pavel {Komarov} and Andréa {Deák} and Matej {Baláž} and Deborah E. {Crawford} and Sebastian {Díaz de la Torre} and Ede {Bodoki} and Jaroslav {Cihlář}",
title="High-energy ball milling and spark plasma sintering of molybdenum - lanthanum oxide (Mo-La2O3) and molybdenum - lanthanum zirconate (Mo-La2Zr2O7) composite powders",
journal="INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS",
year="2022",
volume="102",
number="1",
pages="1--13",
doi="10.1016/j.ijrmhm.2021.105717",
issn="0263-4368",
url="https://www.sciencedirect.com/science/article/pii/S0263436821002493"
}Documents