Molar heat capacity of liquid Ti, Al20Ti80 and Al50Ti50 measured in electromagnetic levitation

IF 1.1 4区工程技术 Q4 Engineering High Temperatures-high Pressures Pub Date : 2022-01-01 DOI:10.32908/hthp.v51.1169

J. Brillo, J. Wessing, H. Kobatake, H. Fukuyama

引用次数: 3

Abstract

Temperature dependent isobaric molar heat capacity cP was measured in a containerless way for liquid Ti and two AlTi binary liquid alloys. The technique of electromagnetic levitation was used in combination with laser modulation calorimetry. In all cases, linear temperature dependencies were found: At the corresponding liquidus temperatures, cP equals 49.75(±2.0) J∙K-1mol-1, 57.43(±2.9) J∙K-1mol-1, and 42.60(±2.2) J∙K-1mol-1, for Ti, Al20Ti80 and Al50Ti50, respectively. The respective temperature coefficients amount to -1.67∙10-2J∙K-2mol-1, -2.73∙10-2J∙K-2mol-1, and +7.83∙10-2J∙K-2mol-1. For liquid Ti, there is a good agreement with existing literature data. The results are discussed in relation to the Neumann-Kopp rule.

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电磁悬浮法测量液体Ti、Al20Ti80和Al50Ti50的摩尔热容

用无容器的方法测量了液体Ti和两种AlTi二元液体合金的温度依赖等压摩尔热容cP。将电磁悬浮技术与激光调制量热法相结合。在所有情况下，都发现了线性温度依赖性:在相应的液相温度下，Ti、Al20Ti80和Al50Ti50的cP分别为49.75(±2.0)J∙K-1mol-1、57.43(±2.9)J∙K-1mol-1和42.60(±2.2)J∙K-1mol-1。温度系数分别为-1.67∙10-2J∙K-2mol-1、-2.73∙10-2J∙K-2mol-1和+7.83∙10-2J∙K-2mol-1。对于液态Ti，与已有文献数据吻合较好。并结合Neumann-Kopp规则对结果进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.