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X-ray diffraction study of aluminum carbide powder to 50 GPa

J. Appl. Phys. 106, 083511 (2009); doi:10.1063/1.3246808

Published 22 October 2009

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Cheng Ji, Yanzhang Ma, Ming-Chien Chyu, Russell Knudson, and Hongyang Zhu
Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, USA
The crystal structure and equation of state (EOS) of aluminum carbide (Al4C3) have been determined directly up to 50.1 GPa at room temperature by the synchrotron x-ray diffraction techniques. The results indicate that Al4C3 remained in rhombohedral structure under all tested pressure-temperature conditions and exhibited anisotropic compressibility, with the c-axis more compressible than the a-axis. Fitting the experimental data to third order Birch–Murnaghan EOS yields a bulk modulus of KOT=233±6  GPa with its pressure derivative KOT[prime]=3.4±0.4, while the second-order EOS yields KOT=223±2  GPa. ©2009 American Institute of Physics
History: Received 9 July 2009; accepted 19 September 2009; published 22 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083511/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.43.Gt
    Structure of powders and porous materials
  • 61.66.Fn
    Crystal structure of specific inorganic compounds
  • 64.30.-t
    Equations of state of specific substances
  • 81.40.Jj
    Elasticity and anelasticity, stress-strain relations
  • 62.20.de
    Elastic moduli of solids
  • YEAR: 2009

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0021-8979 (print)   1089-7550 (online)
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