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X-Ray Line Broadening Study on Shock-Modified Hematite

  • Y. Zhang (a1), J. M. Stewart (a1), B. Morosin (a2), R. A. Graham (a2) and C. R. Hubbard (a3)...


Hematite (α-Fe2O3) powder compacts have been subjected to controlled, quantitative high pressure shock loading at peak pressures from 8-27 GPa and preserved for post shook analysis. The broadened x-ray diffraction peak profiles have been analyzed to determine the residual lattice strain and the coherent crystallite sizes. Maximum modification effects are observed near 17 GPa with strain values near 3 x 10-3 and size values near 200 Å suggesting annealing at higher shock pressure, resulting from the higher shock temperature.



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