晶界对多晶立方氮化硼弹性和导热性的影响

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

Journal of Superhard Materials Pub Date : 2025-07-20 DOI:10.3103/S1063457625030037

V. I. Kushch, I. A. Petrusha, V. Z. Turkevych

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引用次数: 0

摘要

建立了具有不完美晶界和残余孔隙度的多晶弹性和导热系数的理论模型。在对这些模型研究数据进行分析的基础上，对多晶立方氮化硼的晶界热导率和弹性进行了定量估计，并研究了烧结温度对两者的影响。多晶的宏观热弹性特性强烈依赖于晶界的状态和特性，这使得晶界作为多晶结构完善的标准得以应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Effect of Grain Boundaries on the Elasticity and Thermal Conductivity of Polycrystalline Cubic Boron Nitride

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Effect of Grain Boundaries on the Elasticity and Thermal Conductivity of Polycrystalline Cubic Boron Nitride

Theoretical models of elasticity and thermal conductivity have been developed for a polycrystal with imperfect grain boundaries and residual porosity. Based on the analysis of research data by these models, a quantitative estimate has been obtained for the thermal conductivity and elasticity of grain boundaries in polycrystalline cubic boron nitride, and the effect of the sintering temperature on them was studied. A strong dependence of macroscopic thermoelastic properties of a polycrystal on the state and properties of grain boundaries enables the application of the latter as a criterion of structural perfection in a polycrystal.

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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.