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26 papers
Thermophysical Properties of Materials
Correlation of temperature dependences of thermal expansion and the heat capacity of refractory metal up to the melting point: Tungsten
V. Yu. Bodryakov Urals State Pedagogical University
Abstract:
In continuing the series of publications started by the article about molybdenum, a detailed study of the correlation between the volume thermal expansion coefficient,
$\text{o}(T)$, and the heat capacity,
$C(T)$, of another refractory metal, tungsten, is carried out. It is shown that a distinct correlation of
$\text{o}(C)$ takes place not only at low temperatures, where it is linear and is known as the Grüneisen law, but also within a much wider temperature region, up to the melting point of the metal. A significant deviation from the low-temperature behavior of the linear dependence of
$\text{o}(C)$ occurs when the heat capacity reaches its classical Dulong and Petit limit,
$3R$. The concept of the temperature dependence of the differential Grüneisen parameter,
$\gamma ' \sim (\partial\text{o}/\partial C)$ is introduced, and its evaluation is proposed.
UDC:
536.416; 536.631; 536.713
Received: 28.03.2014
Accepted: 05.11.2014
DOI:
10.7868/S0040364415040067
Fulltext:
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