Abstract
The heat capacity at constant pressure C p of alpha (HCP) titanium from 200 to 1000 K has been analyzed for contributions from lattice vibrations and electron excitations. Experimental data in the literature have been used to obtain the heat capacity at constant volume C V by the dilation correction. From C V has been subtracted an harmonic lattice contribution C VH given by the Debye heat capacity using a single Debye temperature and an electronic contribution C VE . The difference C V −(C VH +C VE ) is positive, and from about 600 to 1000 K it is real in the sense that it is larger than the experimental uncertainty in C V . This difference is attributed to an anharmonic lattice vibration contribution C VA . Two models for C VE have been used. One, which includes electron-phonon enhancement, leads to a C VA of about 15% of C V at 1000 K. The other takes into account the shift in the density of states with temperature and leads to a C VA of about 5% of C V
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Brooks, C.R. Contributions to the heat capacity of alpha (HCP) titanium from 200–1000 K. Int J Thermophys 2, 371–380 (1981). https://doi.org/10.1007/BF00498767
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DOI: https://doi.org/10.1007/BF00498767