Effect of the Concentration of Components and the Size of Heaters on the Thermal State of a High-Pressure Cell to Study the Solubility of Gallium Nitride in Iron

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Superhard Materials Pub Date : 2023-05-09 DOI:10.3103/S1063457623020077

O. P. Liudvichenko, O. O. Lyeshchuk, І. A. Petrusha

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Abstract

We considered the existing technologies for obtaining crystals of gallium nitride. The finite element method was used to create a model of the thermal state of a cell in a high-pressure apparatus that was used to examine the solubility of gallium nitride in iron. The calculation results are represented as temperature fields in different elements of the apparatus. The effect of varying the wall thickness of a tubular heater and changing the concentration of zirconium dioxide in axial heaters on the thermal state of a high-pressure cell is studied. When the wall thickness of the tubular heater is altered, the temperature in the center of the cell changes linearly. An increase in the heater thickness leads to an insignificant (~2°C) increase in the maximum temperature drop in the iron sample under study. The temperature difference at the characteristic points of the cell in the radial and axial directions decreases with an increase in the concentration of zirconium dioxide in the axial heaters. The optimal composition of axial heaters for conducting experiments on studying the solubility of gallium nitride in iron corresponds to the concentrations of ZrO₂ and graphite of 60 and 40 wt %, respectively.

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研究氮化镓在铁中的溶解度的高压电池中元件浓度和加热器尺寸对热状态的影响

我们考虑了现有的获得氮化镓晶体的技术。采用有限元法建立了高压装置中电池热状态的模型，该装置用于检测氮化镓在铁中的溶解度。计算结果用仪器中不同元件的温度场表示。研究了改变管式加热器壁厚和改变轴向加热器二氧化锆浓度对高压电池热状态的影响。当管状加热器的壁厚改变时，电池中心的温度呈线性变化。加热器厚度的增加导致所研究的铁样品的最大温降增加不显著(~2°C)。随着二氧化锆浓度的增加，电解槽径向和轴向特征点的温差减小。研究氮化镓在铁中溶解度的最佳轴向加热器组成为ZrO2浓度为60%，石墨浓度为40%。

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来源期刊

Journal of Superhard Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

66.70%

发文量

审稿时长

2 months

期刊介绍： Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.