镁-镭系合金热物理性质的温度依赖性和热力学函数的变化

IF 1 4区物理与天体物理 Q4 PHYSICS, APPLIED High Temperature Pub Date : 2024-02-29 DOI:10.1134/s0018151x23010212

I. N. Ganiev, A. G. Safarov, E. S. Dodkhoev, K. Boturov, U. Sh. Yakubov, F. Kholmurodov

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引用次数: 0

摘要

摘要在冷却模式下，研究了 300-700 K 温度范围内 Mg-La 系合金比热的温度依赖性和热力学函数的变化。结果表明，随着镧浓度的增加，镁的比热，特别是镧的添加量从 5%到 10%时，明显降低，而随着温度的增加，比热增加。已确定的是，随着温度的升高，合金的焓和熵增加，而吉布斯能值降低。这些函数与镁中的镧含量成反比。

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Temperature Dependence of Thermophysical Properties and Changes in the Thermodynamic Functions of Mg–La System Alloys

Abstract

In cooling mode, the temperature dependence of the specific heat and changes in the thermodynamic functions of alloys of the Mg–La system in the temperature range of 300–700 K were studied. It has been shown that with increasing lanthanum concentration, the specific heat of magnesium, especially with the addition of lanthanum from 5 to 10%, noticeably decreases, and increases with increasing temperature. It has been established that with increasing temperature, the enthalpy and entropy of the alloys increase, and the values of the Gibbs energy decrease. The dependence of these functions on the lanthanum content in magnesium is inverse.

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来源期刊

High Temperature 物理-物理：应用

CiteScore

1.50

自引率

40.00%

发文量

审稿时长

4-8 weeks

期刊介绍： High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.