A Comparative Study of the Impact of La2O3 and La2Zr2O7 Dispersions on Molybdenum Microstructure, Mechanical Properties, and Fracture

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dc.contributor.authorTkachenko, Serhiics
dc.contributor.authorSlámečka, Karelcs
dc.contributor.authorBednaříková, Vendulacs
dc.contributor.authorRemešová, Michaelacs
dc.contributor.authorGejdoš, Pavelcs
dc.contributor.authorKsenzova, Olhacs
dc.contributor.authorValášek, Danielcs
dc.contributor.authorDvořák, Karelcs
dc.contributor.authorŠulák, Ivocs
dc.contributor.authorGálíková, Markétacs
dc.contributor.authorBaláž, Matejcs
dc.contributor.authorDeák, Andréacs
dc.contributor.authorCihlář, Jaroslavcs
dc.contributor.authorČelko, Ladislavcs
dc.coverage.issueOctobercs
dc.coverage.volume33cs
dc.date.accessioned2025-04-04T11:56:56Z
dc.date.available2025-04-04T11:56:56Z
dc.date.issued2024-10-23cs
dc.description.abstractWe report, for the first time, the effect of lanthanum zirconate (La2Zr2O7) particles on the microstructure and mechanical behavior of an experimental molybdenum oxide dispersion-strengthened alloy. The focus was on the preparation of the novel Mo-La2Zr2O7 composite using high-energy ball milling and spark plasma sintering and on the comparison of its microstructural and mechanical properties with pure Mo and Mo-La2O3 ODS alloy counterparts. Mechanical properties were assessed using a Vickers hardness test at room temperature and a three-point flexural test in the temperature range from - 150 to 150 degrees C. The microstructure of the studied materials and their fracture behavior were evaluated using x-ray diffraction, energy-dispersive x-ray spectroscopy, and scanning electron and transmission electron microscopy. The strengthening effect of La2Zr2O7 particles was found to be lower than that of La2O3 particles, resulting in a 30-35% lower yield stress and flexural strength of the Mo-La2Zr2O7 alloy compared to the Mo-La2O3 alloy. The experimental Mo-La2Zr2O7 alloy exhibited low plasticity and no distinct ductile-to-brittle transition temperature (DBTT) in the tested temperature range, unlike pure Mo and the Mo-La2O3 alloy, which had the DBTT of 63 and 1 degrees C, respectively. Fracture occurred mainly in a brittle intergranular manner in the entire testing temperature range, while the counterpart materials showed localized plastic stretching at grain boundaries and within grains at and above the transition region. The observed behavior was primarily related to lower strengthening and brittleness as well as less effective grain boundary purification.en
dc.formattextcs
dc.format.extent14483-14494cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Materials Engineering and Performance. 2024, vol. 33, issue October , p. 14483-14494.en
dc.identifier.doi10.1007/s11665-024-10300-4cs
dc.identifier.issn1544-1024cs
dc.identifier.orcid0000-0001-9111-1520cs
dc.identifier.orcid0000-0001-8847-075Xcs
dc.identifier.orcid0000-0003-0672-7481cs
dc.identifier.orcid0000-0003-1678-5618cs
dc.identifier.orcid0000-0001-5955-9763cs
dc.identifier.orcid0000-0003-2111-3357cs
dc.identifier.orcid0009-0000-8410-9107cs
dc.identifier.orcid0000-0002-4026-6845cs
dc.identifier.orcid0000-0003-0264-3483cs
dc.identifier.other191165cs
dc.identifier.researcheridG-7772-2018cs
dc.identifier.researcheridD-9475-2012cs
dc.identifier.researcheridAAA-8935-2021cs
dc.identifier.researcheridE-3735-2012cs
dc.identifier.researcheridK-2385-2014cs
dc.identifier.researcheridKDM-8675-2024cs
dc.identifier.researcheridH-7211-2014cs
dc.identifier.researcheridD-6870-2012cs
dc.identifier.scopus55223374100cs
dc.identifier.scopus16242487800cs
dc.identifier.scopus56177144000cs
dc.identifier.scopus49863280700cs
dc.identifier.scopus54992801300cs
dc.identifier.scopus58881912200cs
dc.identifier.scopus7004377038cs
dc.identifier.scopus25621022900cs
dc.identifier.urihttps://hdl.handle.net/11012/250801
dc.language.isoencs
dc.publisherSPRINGERcs
dc.relation.ispartofJournal of Materials Engineering and Performancecs
dc.relation.urihttps://link.springer.com/article/10.1007/s11665-024-10300-4cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1544-1024/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectDBTTen
dc.subjectfractureen
dc.subjectlanthanum zirconateen
dc.subjectmolybdenumen
dc.subjectrare-earth oxideen
dc.titleA Comparative Study of the Impact of La2O3 and La2Zr2O7 Dispersions on Molybdenum Microstructure, Mechanical Properties, and Fractureen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-191165en
sync.item.dbtypeVAVen
sync.item.insts2025.04.04 13:56:55en
sync.item.modts2025.04.04 09:32:08en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav technologie stavebních hmot a dílcůcs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Středoevropský technologický institut VUTcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé povlakycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilá multifunkční keramikacs
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