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Low temperature heat capacities of Ti3Al1.1C1.8, Ti4AlN3, and Ti3SiC2
Ho, J. C.
Hamdeh, Hussein H.
Barsoum, M. W.
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Ho, J.C.; Hamdeh, H.H.; Barsoum, M.W.; El-Raghy, T.; , "Low temperature heat capacities of Ti3Al1.1C1.8, Ti4AlN3, and Ti3SiC2," Journal of Applied Physics , vol.86, no.7, pp.3609-3611, Oct 1999.doi: 10.1063/1.371267
For the binary Ti Al system, an ordering transformation in Ti3Al has been shown to result in a significant lowering of the electronic heat-capacity coefficient, ?, by removing electrons from conducting states. When ? is normalized to a per Ti atom basis, the same tendency is found in low temperature calorimetric studies of the conducting ternary carbides Ti3Al1.1C1.8, Ti4AlN3, and Ti3SiC2 reported herein. As a consequence of C- or N-induced covalent-like bond formation, the Debye temperatures in these ternaries are in excess of 700 K. © 1999 American Institute of Physics.
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