Abstract
Evidence for rapid ordering in a supercooled CuZr liquid, obtained from high-energy x-ray diffraction in a containerless processing environment, is presented. Relatively sudden changes were observed in the topological and chemical short-range order near 850 °C, a temperature that is 75 °C below the liquidus temperature and 465 °C above the glass transition temperature. A peak in the specific heat was observed with supercooling, with an onset near 850 °C (the same temperature as the onset of ordering) and a maximum near 700 °C, consistent with the prediction of a molecular-dynamics calculation using embedded atom potentials. The chemical and topological ordering measured here are in agreement with predictions of a rapid development of chemically ordered icosahedral clusters in the supercooled liquid.
2 More- Received 30 September 2010
DOI:https://doi.org/10.1103/PhysRevB.83.094116
©2011 American Physical Society
Erratum
Erratum: Rapid chemical and topological ordering in supercooled liquid CuZr [Phys. Rev. B 83, 094116 (2011)]
V. Wessels, A. K. Gangopadhyay, K. K. Sahu, R. W. Hyers, S. M. Canepari, J. R. Rogers, M. J. Kramer, A. I. Goldman, D. Robinson, J. W. Lee, J. R. Morris, and K. F. Kelton
Phys. Rev. B 85, 029904 (2012)
Synopsis
Metals are supercool
Published 15 March 2011
Structural changes in an alloy may lead to a clearer picture of glass transitions in liquid metals.
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