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Published May 1, 2001 | Published
Journal Article Open

Nanocrystalline iron at high pressure

Abstract

X-ray diffraction measurements were performed on nanocrystalline iron up to 46 GPa. For nanocrystalline epsilon-Fe, analysis of lattice parameter data provides a bulk modulus, K, of 179±8 GPa and a pressure derivative of the bulk modulus, K[prime], of 3.6±0.7, similar to the large-grained control sample. The extrapolated zero-pressure unit cell volume of nanocrystalline epsilon-Fe is 22.9±0.2 Å^3, compared to 22.3±0.2 Å^3 for large-grained epsilon-Fe. No significant grain growth was observed to occur under pressure.

Additional Information

© 2001 American Institute of Physics. (Received 4 January 2001; accepted 29 January 2001) The authors thank Dr. Jingzhu Hu for help with the XRD operation in X17C, NSLS. This work was supported by the National Science Foundation and the Petroleum Research Foundation.

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August 21, 2023
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