采用还原光聚合法制备具有优异高温力学性能的复合形状Al2O3/YAG/ZrO2共晶陶瓷

IF 10.3 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Additive manufacturing Pub Date : 2025-02-13 DOI:10.1016/j.addma.2025.104703

Shuqi Hao , Haijun Su , Di Zhao , Xiang Li , Zhonglin Shen , Yuan Liu , Yinuo Guo , Zhuo Zhang , Min Guo

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引用次数: 0

摘要

由于相界面结合强，定向凝固氧化物共晶陶瓷在室温和高温下均表现出优异的性能，这决定了其在超高温结构件领域具有广阔的应用前景。然而，目前采用定向凝固技术制备的氧化物共晶陶瓷无法同时具有大体积、复杂形状和均匀精细的共晶结构。本研究利用激光浮区熔融、还原光聚合3D打印和热等静压相结合的方法，首次成功制备了具有接近全相对密度和均匀精细共晶结构的复杂形状Al2O3/YAG/ZrO2陶瓷空心导叶。通过1670℃无压烧结2 h，获得了相对密度为91.97 ± 1.25 %的孔隙度完全封闭的共晶陶瓷。在1550℃、200 MPa、60 min的热等静压条件下，制备了相对密度为99.27 ± 0.22 %的Al2O3/YAG/ZrO2共晶烧结陶瓷。烧结的高密度共晶陶瓷室温抗弯强度为352.99 ± 39.97 MPa。在1500℃时，其抗弯强度可保持299.38 MPa，强度保持率高达84.81 %。硬度为19.10 ± 0.69 GPa，断裂韧性为2.22 ± 0.21 MPa·m1/2。这项工作为复杂形状氧化物共晶陶瓷元件的制备提供了一种新的解决方案。

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Complex shaped Al2O3/YAG/ZrO2 eutectic ceramics with excellent high temperature mechanical properties printed by vat photopolymerization

Directionally solidified oxide eutectic ceramics exhibit excellent performances at both room and high temperatures due to strong phase interface binding, which determines broad application prospects in the field of ultra-high temperature structural components. However, oxide eutectic ceramics prepared by current directional solidification techniques are unable to simultaneously possess large volumes, complex shapes, and uniformly fine eutectic structures. In this study, complex shaped Al₂O₃/YAG/ZrO₂ eutectic ceramic hollow guide blades with nearly full relative density and uniformly fine eutectic microstructure were successfully prepared for the first time, utilizing a combination of laser floating zone melting, vat photopolymerization 3D printing and hot isostatic pressing. Sintered eutectic ceramics with fully closed porosity achieving a relative density of 91.97 ± 1.25 % were obtained by pressureless sintering at 1670℃ for 2 h. Al₂O₃/YAG/ZrO₂ sintered eutectic ceramics with a relative density of 99.27 ± 0.22 % were obtained by hot isostatic pressing at 1550℃ with 200 MPa for 60 min. The sintered highly densed eutectic ceramic exhibited a bending strength of 352.99 ± 39.97 MPa at room temperature. This bending strength can remain a value of 299.38 MPa at 1500°C, which is corresponding to a high strength retention rate of 84.81 %. Additionally, the hardness was 19.10 ± 0.69 GPa and the fracture toughness was 2.22 ± 0.21 MPa·m^1/2. This work offers a novel solution for the preparation of complex shaped oxide eutectic ceramic components.

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来源期刊

Additive manufacturing Materials Science-General Materials Science

CiteScore

19.80

自引率

12.70%

发文量

648

审稿时长

35 days

期刊介绍： Additive Manufacturing stands as a peer-reviewed journal dedicated to delivering high-quality research papers and reviews in the field of additive manufacturing, serving both academia and industry leaders. The journal's objective is to recognize the innovative essence of additive manufacturing and its diverse applications, providing a comprehensive overview of current developments and future prospects. The transformative potential of additive manufacturing technologies in product design and manufacturing is poised to disrupt traditional approaches. In response to this paradigm shift, a distinctive and comprehensive publication outlet was essential. Additive Manufacturing fulfills this need, offering a platform for engineers, materials scientists, and practitioners across academia and various industries to document and share innovations in these evolving technologies.