Time-resolved x-ray diffraction and electrical resistance measurements of structural phase transitions in zirconium

18th APS-SCCM; 24th AIRAPT

Velisavljevic, N.^1 ; Sinogeikin, S.^2 ; Saavedra, R.^1 ; Chellappa, R.S.^1 ; Rothkirch, A.^3 ; Dattelbaum, D.M.^1 ; Konopkova, Z.^3 ; Liermann, H.-P.^3 ; Bishop, M.^4 ; Tsoi, G.M.^4 ; Vohra, Y.K.^4

Los Alamos National Laboratory, Los Alamos

NM, United States^1

HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne

IL, United States^2

Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany^3

Department of Physics, University of Alabama at Birmingham, Birmingham

AL, United States^4

关键词: Electrical resistance measurement;    Experimental platform;    In-situ X-ray diffraction;    Pressure controllers;    Structural evolution;    Structural phase transition;    Time resolved x-ray diffractions;    Time-resolved data;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/3/032020/pdf
DOI  :  10.1088/1742-6596/500/3/032020

来源: IOP

【 摘 要 】

We have designed a portable pressure controller module to tune compression rates and maximum pressures attainable in a standard gas-membrane diamond anvil cell (DAC). During preliminary experiments, performed on zirconium (Zr) metal sample, pressure jumps of up to 80 GPa were systematically obtained in less than 0.2s (resulting in compression rate of few GPa/s up to more than 400 GPa/s). In-situ x-ray diffraction and electrical resistance measurements were performed simultaneously during this rapid pressure increase to provide the first time resolved data on α ω β structural evolution in Zr at high pressures. Direct control of compression rates and peak pressures, which can be held for prolonged time, allows for investigation of structural evolution and kinetics of structural phase transitions of materials under previously unexplored compression rate-pressure conditions that bridge traditional static and shock/dynamic experimental platforms.