Chin. Phys. Lett.  2009, Vol. 26 Issue (11): 117102    DOI: 10.1088/0256-307X/26/11/117102
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Electronic Structure and Elastic Properties of Ti3AlC from First-Principles Calculations
DU Yu-Lei
Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094
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DU Yu-Lei 2009 Chin. Phys. Lett. 26 117102
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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.
Keywords: 71.20.Ps      62.20.D-      81.05.Je     
Received: 11 May 2009      Published: 30 October 2009
PACS:  71.20.Ps (Other inorganic compounds)  
  62.20.D- (Elasticity)  
  81.05.Je (Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides))  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/11/117102       OR      https://cpl.iphy.ac.cn/Y2009/V26/I11/117102
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DU Yu-Lei
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