Influence of Lanthanum Additives on the Temperature Dependence of Thermophysical Properties and Changes in the Thermodynamic Functions of Lead Babbitt BLa (PbSb15Sn10)

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials: Applied Research Pub Date : 2024-05-23 DOI:10.1134/s2075113324010301

M. S. Zarifova, I. N. Ganiev, Kh. I. Kholov, F. K. Khodzhaev

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Abstract

The article summarizes the results of experimental studies of the temperature dependence of the thermophysical properties and thermodynamic functions of lead babbitt BLa (PbSb15Sn10) with lanthanum additives. The heat capacity of lead babbitt was determined in the “cooling” mode according to the known heat capacity of a reference sample of C2C lead. For this purpose, by processing the cooling curves of lead babbitt samples and reference, equations were obtained that describe their cooling rates. Further, on the basis of the experimentally found cooling rates of the reference and alloy samples, knowing their masses, polynomials for the temperature dependence of the heat capacity of the alloys and the standard were established, which are described by a four-term equation. Using integrals of specific heat capacity, the temperature dependence of changes in enthalpy, entropy, and Gibbs energy is determined. The data obtained show that, with increasing temperature, the heat capacity, heat transfer coefficient, enthalpy, and entropy of babbitt BLa (PbSb15Sn10) increase, and the Gibbs energy decreases. At the same time, lanthanum additives from 0.01 to 1.0 wt % increase the heat capacity, enthalpy, and entropy of babbitt BLa (PbSb15Sn10), while the value of the Gibbs energy decreases.

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镧添加剂对铅巴比特 BLa（PbSb15Sn10）热物理特性的温度依赖性和热力学函数变化的影响

摘要本文总结了对添加了镧添加剂的铅巴比特 BLa（PbSb15Sn10）的热物理性质和热力学函数的温度依赖性的实验研究结果。在 "冷却 "模式下，根据 C2C 铅参考样品的已知热容量测定了巴比妥铅的热容量。为此，通过处理巴比特铅样品和参考样品的冷却曲线，得到了描述其冷却速率的方程式。此外，根据实验得出的参考样品和合金样品的冷却速率，并了解它们的质量，建立了合金和标准热容量随温度变化的多项式，该多项式由一个四项方程描述。利用比热容的积分，确定了焓、熵和吉布斯能变化的温度依赖性。所得数据表明，随着温度的升高，巴比妥 BLa（PbSb15Sn10）的热容量、传热系数、焓和熵都会增加，而吉布斯能则会降低。同时，0.01 至 1.0 wt % 的镧添加剂会增加巴比妥 BLa（PbSb15Sn10）的热容量、热焓和热熵，而吉布斯能值则会降低。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.