使用条件下粘土砖显微结构与高温力学性能关系的定量表征

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.224

Qingyou Zhu, Zhenglong Liu, Yucheng Yin, Bolin Yang, Zhiqiang Liu, Chao Yu, Jun Ding, Hongxi Zhu, Chengji Deng

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引用次数: 0

摘要

本研究探讨了粘土砖耐火材料在高温（900-1300℃）下的性能退化机理，以确保其符合使用条件下的性能要求。结果表明：紧密联锁的莫来石刚玉结构使材料在900℃以下仍能保持较高的强度（74.5 MPa）；然而，随着温度的升高，玻璃相的迁移、热膨胀失配、晶界的弱化以及液相含量的增加共同导致了力学性能的下降。此外，材料中液相含量的增加削弱了晶间结合强度，进一步降低了高温下粘土砖的力学性能。因此，材料强度在1300℃时急剧下降至4.1 MPa。

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Quantitative characterization of the relationship between microstructure and high-temperature mechanical properties of clay bricks under service conditions

This study investigates the performance degradation mechanisms of clay-brick refractories at high temperatures (900–1300 °C) to ensure compliance with performance requirements under service conditions. The results show that the closely interlocked mullite-corundum structure enables the material to maintain a high strength (74.5 MPa) below 900 °C. However, as temperature increases, the migration of the glass phase, mismatch in thermal expansion, weakening of grain boundaries, and increased liquid-phase content collectively result in a decrease in the mechanical properties. In addition, the increased liquid-phase content in the material weakens the intercrystallite bonding strength, further degrading the mechanical properties of the clay bricks at elevated temperatures. Consequently, the material strength declines sharply to 4.1 MPa at 1300 °C.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.