Contributions to the heat capacity of alpha (HCP) titanium from 200–1000 K

✍ Scribed by C. R. Brooks

• Book ID: 104787333
• Publisher: Springer
• Year: 1981
• Tongue: English
• Weight: 397 KB
• Volume: 2
• Category: Article
• ISSN: 0195-928X
• DOI: 10.1007/bf00498767

✦ Synopsis

The heat capacity at constant pressure Cp 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 Cvt 4 given by the Debye heat capacity using a single Debye temperature and an electronic contribution CvE. The difference C v -(Cvl 4 + CvE ) is positive, and from about 600 to 1000 K it is real in the sense that it is larger than the experimental uncertainty in Cv. This difference is attributed to an anharmonic lattice vibration contribution CVA. Two models for CvE have been used. One, which includes electron-phonon enhancement, leads to a CvA of about 15% of Cv at 1000 K. The other takes into account the shift in the density of states with temperature and leads to a CvA of about 5% of C v.