Nitridation of a Ti–V Metal Pair and Evaluation of the Thermoelectric Power of the Resultant Ceramic

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials Pub Date : 2024-03-19 DOI:10.1134/S0020168523120063
I. A. Kovalev, G. S. Drobakha, G. P. Kochanov, A. N. Rogova, A. I. Sitnikov, A. A. Polovinkin, S. V. Shevtsov, K. Yu. Demin, A. A. Ashmarin, S. N. Khvostov, A. S. Chernyavskii, K. A. Solntsev
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Abstract

Ceramic nitride samples of tailored composition and shape have been prepared by controlled nitridation of Ti–V metal pairs. We have obtained kinetic and current–voltage curves for the interaction of the Ti–V metal pairs with nitrogen. In different parts of the metal pairs, the nitridation process follows different mechanisms. In the case of the pure metals, the formation of nearly stoichiometric ceramics involves the formation of three- and two-layer graded structures. Nitridation of the junction region, containing a Ti–V solid solution, is determined by the chemical affinity of titanium and vanadium for nitrogen. The formation of titanium nitride leads to decomposition of the Ti–V solid solution in the junction and vanadium metal separation on grain boundaries. The rate of vanadium nitridation increases as the titanium content of the solid solution decreases. The thermoelectric voltage of the Ti–V system in the temperature range from –195.7 to +550°C has been evaluated as a function of the degree of nitridation. The thermoelectric voltage and Seebeck coefficient of metal–ceramic and ceramic structures have been determined as functions of temperature. Characteristically, the thermoelectric voltage of all the nitrided pairs rises monotonically over the entire temperature range studied. Nitrided titanium–vanadium pairs with tailored composition can be used as ceramic thermoelectric converters.

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钛-钒金属对的氮化及其陶瓷热功率评估
摘要 通过对 Ti-V 金属对进行受控氮化,制备出了具有特定成分和形状的氮化陶瓷样品。我们获得了 Ti-V 金属对与氮相互作用的动力学和电流电压曲线。在金属对的不同部分,氮化过程遵循不同的机制。在纯金属的情况下,形成接近化学计量的陶瓷涉及三层和两层分级结构的形成。包含钛-钒固溶体的交界区域的氮化过程则由钛和钒对氮的化学亲和力决定。氮化钛的形成会导致交界处钛-钒固溶体的分解和晶界上钒金属的分离。随着固溶体中钛含量的减少,钒的氮化速率也会增加。作为氮化程度的函数,对温度范围在 -195.7 至 +550°C 的 Ti-V 系统的热电电压进行了评估。测定了金属陶瓷和陶瓷结构的热电电压和塞贝克系数与温度的函数关系。在研究的整个温度范围内,所有氮化对的热电电压都呈单调上升趋势。具有定制成分的氮化钛钒对可用作陶瓷热电转换器。
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来源期刊
Inorganic Materials
Inorganic Materials 工程技术-材料科学:综合
CiteScore
1.40
自引率
25.00%
发文量
80
审稿时长
3-6 weeks
期刊介绍: Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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