Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg

Beason, Matthew Thomas; Mandal, Anirban; Jensen, Brian J.

doi:10.1103/PhysRevB.101.024110

Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg

Journal Article · Thu Jan 23 23:00:00 EST 2020 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.101.024110· OSTI ID:1595283

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Institute for Shock Physics, Washington State University
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Time-resolved x-ray diffraction was used to examine the phase evolution of polycrystalline Mg shocked along the principal Hugoniot to states that span multiple phase boundaries into the liquid. Here, the diffraction data indicate that the hcp-bcc phase boundary lies above 27 GPa, with the hcp-bcc transition occurring within nanoseconds of loading. Experiments at 55 GPa reveal a mixture of bcc and liquid, indicating incipient melt occurring 10–15 GPa lower than previously reported, with complete melting observed at 63 GPa.

View Accepted Manuscript (DOE)

Research Organization:: Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division

Grant/Contract Number:: NA0002442; 89233218CNA000001; AC02-06CH11357

OSTI ID:: 1595283

Alternate ID(s):: OSTI ID: 1597351
OSTI ID: 1598009

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 101; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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