添加Y2O3的无压烧结Al4O4C陶瓷

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-06-28 DOI:10.1016/j.matchar.2025.115329

Guobo Wu , Chao Yu , Xishuang Gu , Hourui Cheng , Xu Cheng , Chengji Deng , Jun Ding , Zhenglong Liu , Zhoufu Wang , Hongxi Zhu

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引用次数: 0

摘要

采用无压烧结法制备了Al4O4C陶瓷，研究了Y2O3含量对其致密化和力学性能的影响。在1800℃下烧结3h， Al4O4C为主要相，Y3Al5O12为次要相。原位钇铝石榴石有效地增强了陶瓷的致密化，提高了陶瓷的力学性能。结果表明，优化Y2O3含量对获得良好的力学性能起着至关重要的作用。当Y2O3质量分数为3 wt%时，合金的抗折强度最高，达到197.3 MPa；当Y2O3质量分数为5 wt%时，合金的维氏硬度和断裂韧性分别达到14.3 GPa和2.6 MPa·m1/2。本研究为今后Al4O4C陶瓷的研究和应用奠定了基础。

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Pressureless sintered Al4O4C ceramics with Y2O3 addition

Al₄O₄C ceramics were prepared via pressureless sintering, and the effects of Y₂O₃ content on their densification and mechanical properties were studied. When sintered at 1800 °C for 3 h, Al₄O₄C was identified as the major phase, while Y₃Al₅O₁₂ formed as a secondary phase. The in situ YAG effectively enhanced the densification of the ceramics and contributed to the improvement in their mechanical properties. The results indicate that the optimization of Y₂O₃ content plays a crucial role in achieving favorable mechanical performance. Specifically, the flexural strength peaked at 197.3 MPa with 3 wt% Y₂O₃, while the highest Vickers hardness and fracture toughness of 14.3 GPa and 2.6 MPa·m^1/2 were obtained with 5 wt% Y₂O₃. This study lays a foundation for the future research and application of Al₄O₄C ceramics.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.