Effect of Phase Composition and Internal Structure Parameters on the Functional Properties of High–Temperature Heat–Protective Ceramic Composites MgO–MgAl2O4

IF 2.2 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Physical Mesomechanics Pub Date : 2026-06-13 DOI:10.1134/S1029959925600855

A. S. Buyakov, E. V. Shilko, A. S. Grigoriev, V. V. Shmakov, A. S. Volobuev

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Abstract

The paper presents the results of a study of the functional properties of high–temperature heat–protective ceramic materials based on a composition of MgO and MgAl₂O₄ in a wide range of component concentrations. It is shown that a decrease in the characteristic size of powder particles by two orders of magnitude and an increase in the quality of adhesion provide the achievement of extremely low thermal conductivity of sintered ceramics in combination with high strength and fracture toughness. By varying the volume fraction of components, it is possible to purposefully shift the balance of thermal conductivity, resistance to thermal shocks, and mechanical properties of heat–protective products in relation to specific operating conditions. Quantitative estimates of the effect of micro- and submicroscale discontinuities of the internal structure on the macroscopic functional characteristics of ceramic composites were obtained using computer modeling.

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相组成和内部结构参数对MgO-MgAl2O4高温热防护陶瓷复合材料功能性能的影响

本文介绍了以MgO和MgAl2O4为原料，在不同浓度下制备的高温热防护陶瓷材料的功能性能研究结果。结果表明，粉末颗粒的特征尺寸减小了两个数量级，并增加了粘合质量，从而实现了烧结陶瓷的极低导热系数，同时具有高强度和断裂韧性。通过改变部件的体积分数，可以有目的地改变热防护产品在特定操作条件下的导热性、抗热冲击和机械性能的平衡。通过计算机模拟，定量估计了微观和亚微观结构的不连续性对陶瓷复合材料宏观功能特性的影响。

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

Physical Mesomechanics Materials Science-General Materials Science

CiteScore

3.50

自引率

18.80%

发文量

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related in the physical mesomechanics and also solid-state physics, mechanics, materials science, geodynamics, non-destructive testing and in a large number of other fields where the physical mesomechanics may be used extensively. Papers dealing with the processing, characterization, structure and physical properties and computational aspects of the mesomechanics of heterogeneous media, fracture mesomechanics, physical mesomechanics of materials, mesomechanics applications for geodynamics and tectonics, mesomechanics of smart materials and materials for electronics, non-destructive testing are viewed as suitable for publication.