6533b824fe1ef96bd1280c2d

RESEARCH PRODUCT

Improving the understanding of the melting behaviour of Mo, Ta, and W at extreme pressures

Daniel Errandonea

subject

Shock wavePower seriesCondensed Matter - Materials ScienceMaterials scienceTantalumchemistry.chemical_elementThermodynamicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesTungstenGrüneisen parameterCondensed Matter PhysicsElectronic Optical and Magnetic MaterialschemistryTransition metalPhase (matter)Vacancy defectCondensed Matter::SuperconductivityElectrical and Electronic Engineering

description

We discus existent conflicts between experimentally measured and theoretically calculated melting curves of Mo, Ta, and W. By assuming that vacancy formation plays a fundamental role in the melting process, an explanation for the measured melting curves is provided. Furthermore, we show that the Lindemann law fits well all the measured melting curves of bcc transition metals if the Grueneisen parameter is written as a power series of the interatomic distance. For completeness, we examine possible reasons for current disagreements between shock-wave and DAC experiments. To solve them, we propose the existence of an extra high P-T phase for Mo, Ta, and W

yearjournalcountryeditionlanguage
2004-08-09
https://dx.doi.org/10.48550/arxiv.cond-mat/0408186