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Melting and refreezing of zirconium observed using ultrafast x-ray diffraction

Authors

Radousky,  Harry B.

Armstrong,  Michael R.

Austin,  Ryan A.

Stavrou,  Elissaios

Brown,  Shaughnessy

Chernov,  Alexander A.

Gleason,  Arianna E.

Granados,  Eduardo

Grivickas,  Paulius

Holtgrewe,  Nicholas

Lee,  Hae Ja

/persons/resource/slobanov

Lobanov,  S. S.
3.6 Chemistry and Physics of Earth Materials, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Nagler,  Bob

Nam,  Inhyuk

Prakapenka,  Vitali

Prescher,  Clemens

Walter,  Peter

Goncharov,  Alexander F.

Belof,  Jonathan L.

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Citation

Radousky, H. B., Armstrong, M. R., Austin, R. A., Stavrou, E., Brown, S., Chernov, A. A., Gleason, A. E., Granados, E., Grivickas, P., Holtgrewe, N., Lee, H. J., Lobanov, S. S., Nagler, B., Nam, I., Prakapenka, V., Prescher, C., Walter, P., Goncharov, A. F., Belof, J. L. (2020): Melting and refreezing of zirconium observed using ultrafast x-ray diffraction. - Physical Review Research, 2, 013192.
https://doi.org/10.1103/PhysRevResearch.2.013192


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5000723
Abstract
Ultrafast (130-fs) x-ray diffraction at the Linac Coherent Light Source has been applied to observe shockmelting, which is driven by a rapid (120-ps) laser pulse impinging on a thin (few micrometers) bilayer ofaluminum/zirconium. At a pressure of 100 GPa in the aluminum (130 GPa in the zirconium), there is rapidmelting of both metals and the recrystallization of zirconium into the bcc β phase. We observe the solidificationof the melt starting a few hundred picoseconds following the shock melting, out to 50 ns when the zirconiumis fully crystallized into the bcc β phase at a residual temperature of approximately 2000 K. The pressure isobtained directly from the early time x-ray data, whereas the additional information from the x-ray line widthand intensity at longer times inform a model of crystal nucleation and growth.