Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3130093
Keywords
cadmium compounds; ceramics; ductility; elastic moduli; gallium compounds; indium compounds; lead compounds; self-diffusion; tin compounds; titanium compounds; vacancies (crystal)
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Funding
- Natural Sciences Foundation of China [50672102, 50832008]
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The phase stability and mechanical properties of Ti(2)AC (A=Ga, Cd, Sn, In, and Pb) have close relationship with the behavior of group-A element atoms in these compounds. This letter shows that although the Al, Ga, and In (or Si, Sn, and Pb) are in the same group, the migration energy and vacancy formation energy of group-A atom in Ti2GaC/Ti2InC (or Ti2SnC/Ti2PbC) are noticeable lower than those in Ti2AlC (or Ti3SiC2). The present results are helpful for a better understanding of easy out diffusion and self-extrusion of group-A atoms in these compounds.
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