Synergistic enhancement of strength and toughness in Al2O3-modified La2O3-Al2O3-SiO2 glass/ceramic composites

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-07-27 DOI:10.1111/jace.70127

Daimeng Chen, Ming-an Shi, Bo Li

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Abstract

Materials with multiple superior properties are well suited to meet the demands of rapidly evolving technology. This study delved into the multifaceted impact of Al₂O₃ content on the structure-property relationships within novel (1-x)La₂O₃-Al₂O₃-SiO₂ + xAl₂O₃ glass/ceramic composites. La₂O₃-Al₂O₃-SiO₂ (LAS) glass as a liquid-phase filler facilitated the densification of the composites during sintering. Increasing Al₂O₃ content promoted structural ordering, elevating thermal conductivity to 11.6 W/(m•K). Notably, the composite labelled 50A demonstrated exceptional mechanical performance, including the highest flexural strength of 434.8 MPa, fracture toughness of 4.7 MPa•m^1/2, and Vickers hardness of 10.6 GPa. The combination of grain refinement, microstructural evolution, and crystallinity results in a synergistic increase in flexural strength and fracture toughness of composites. These combined attributes position the optimized composite as a promising substrate for high-performance electronic packaging applications requiring concurrent mechanical robustness and thermal management capabilities.

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al2o3改性La2O3-Al2O3-SiO2玻璃/陶瓷复合材料强度和韧性的协同增强

具有多种优异性能的材料非常适合满足快速发展的技术需求。本研究深入研究了Al2O3含量对新型（1-x）La2O3-Al2O3-SiO2 + xAl2O3玻璃/陶瓷复合材料结构-性能关系的多方面影响。La2O3-Al2O3-SiO2 （LAS）玻璃作为液相填料有利于复合材料在烧结过程中的致密化。Al2O3含量的增加促进了结构的有序，将导热系数提高到11.6 W/（m•K）。值得注意的是，标记为50A的复合材料具有优异的力学性能，包括最高的抗弯强度为434.8 MPa，断裂韧性为4.7 MPa•m1/2，维氏硬度为10.6 GPa。晶粒细化、微观组织演化和结晶度的共同作用使复合材料的抗弯强度和断裂韧性协同提高。这些综合属性使优化后的复合材料成为高性能电子封装应用的有前途的基板，需要同时具有机械稳健性和热管理能力。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.