显微组织效应诱导Ti2O3-SiC复合材料负热膨胀

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-28 DOI:10.1016/j.jallcom.2025.180077

Naike Shi, Xuyang Yan, Longlong Fan, Meng Xu, Yiming Yang, Mengzhe Hou, Takumi Nishikubo, Masaki Azuma, Jun Chen

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引用次数: 0

摘要

调节和减少材料的热膨胀一直是一个挑战。本研究将ti2o3和SiC两种本质正热膨胀（PTE）材料通过显微组织效应结合，获得了负热膨胀（NTE）复合材料。我们成功地实现了Ti2O3在复合材料内部微结构效应的保留和放大。同步x射线计算机断层扫描和压汞孔隙度计显示，复合材料具有独特的孔隙分布和增强的孔隙度，使NTE的性能超出理论预测。这项工作提供了一种通过微结构效应改变材料固有热膨胀行为的新方法，为NTE材料在精密工程中的创新应用铺平了道路。

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Negative Thermal Expansion in Ti2O3-SiC Composites Induced by Microstructural Effect

Regulating and reducing the thermal expansion of materials has long been a challenge. In this study, a composite with negative thermal expansion (NTE) has been obtained by combining two intrinsically positive thermal expansion (PTE) materials—Ti₂O₃ and SiC via microstructural effect. We have realized the successful retention and amplification of the microstructural effect of Ti₂O₃ within the composite. The synchrotron X-ray computed tomography and mercury injection porosimeter reveals that the composite exhibits a unique pore distribution and enhanced porosity, enabling NTE properties that exceed theoretical predictions. This work provides a novel approach to transforming the intrinsic thermal expansion behavior of materials via microstructural effect, paving the way for innovative applications of NTE materials in precision engineering.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.