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TVT, 2012, Volume 50, Issue 6, Pages 775–780 (Mi tvt461)  

Thermophysical Properties of Materials

Equilibrium vacancy parameters and limit temperature of nonequilibrium melting in osmium

V. Ya. Chekhovskoi, V. D. Tarasov

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya ul. 13, Bld. 2, Moscow, 125412, Russia

Abstract: For osmium, based on experimental data on enthalpy and the averaged heat capacity obtained by the method of mixing within the temperature range of $1150$$2960$ K, for the first time the parameters of the equilibrium vacancies for this metal have been determined: the vacancy formation energy $E = 1.8$ eV, the vacancy concentration at melting $c = 3.3%$, and the vacancy formation entropy $S = 25.6$ J/(mol K). The limit temperature of the onset of nonequilibrium melting of osmium $T_{\mathrm{m}} = 4256$ K and its relative value $T_{\mathrm{lim}}/T_{\mathrm{m}} = 1.30$ has been calculated.

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English version:
High Temperature, 2012, 50:6, 722–727

Bibliographic databases:

UDC: 536.63
Received: 06.12.2011

Citation: V. Ya. Chekhovskoi, V. D. Tarasov, “Equilibrium vacancy parameters and limit temperature of nonequilibrium melting in osmium”, TVT, 50:6 (2012), 775–780; High Temperature, 50:6 (2012), 722–727

Citation in format AMSBIB
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\paper Equilibrium vacancy parameters and limit temperature of nonequilibrium melting in osmium
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\pages 775--780
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