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Electronic Structure and Elastic Properties of Ti3AlC from First-Principles Calculations

  • Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094

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  • Received Date: May 10, 2009
  • Published Date: October 31, 2009
    Abstract
  • We perform a first-principles study on the electronic structure and elastic properties of Ti3AlC with an antiperovskite structure. The absence of band gap at the Fermi level and the finite value of the density of states at the Fermi energy reveal the metallic behavior of this compound. The elastic constants of Ti3AlC are derived yielding c11=356GPa, c12=55GPa, c44=157GPa. The bulk modulus B, shear modulus G and Young's modulus E are determined to be 156, 151 and 342GPa, respectively. These properties are compared with those of Ti3AlC2 and Ti2AlC with a layered structure in the Ti-Al-C system and Fe3AlC with the same antiperovskite structure.
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    • References (20)
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