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
O. P. Liudvichenko, O. O. Lyeshchuk, І. A. Petrusha
{"title":"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","authors":"O. P. Liudvichenko, O. O. Lyeshchuk, І. A. Petrusha","doi":"10.3103/S1063457623020077","DOIUrl":null,"url":null,"abstract":"<p>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 ZrO<sub>2</sub> and graphite of 60 and 40 wt %, respectively.</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"45 2","pages":"83 - 92"},"PeriodicalIF":1.2000,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superhard Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.3103/S1063457623020077","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
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.
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.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
