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

https://www.sciencedirect.com/science/article/pii/S0263436821002493

Full text in the Digital Library

http://hdl.handle.net/11012/203541

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

1-s2.0-S0263436821002493-main
105717_accepted