首页|Thermal shock resistant 3D printed ceramics reinforced with MgAl2O4 shell structure

Thermal shock resistant 3D printed ceramics reinforced with MgAl2O4 shell structure

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The demand for the swirl nozzle with enhanced temperature resistance and lightweight properties is in-creasing as the thrust-to-weight ratio of aero-engines rises.The Al2O3 ceramic swirl nozzle can maintain high strength in a hostile environment of high temperature and severe corrosion,while also meeting the requirements of aircraft to enhance efficiency and decrease weight.However,Al2O3 ceramics are limited in their application for aerospace components due to their poor thermal shock resistance(TSR)stemming from their inherent brittleness.This work reported an innovative design and fabrication strategy based on photopolymerization 3D printing technology to realize the three-dimensional shell structure through element interdiffusion and nanoscale stacking of the reinforced phase.With this strategy,a novel type of the new dual-structure Al2O3 ceramic composed of MgAl2O4 shell structure and matrix could be con-structed in situ.The nano-sized MgAl2O4 caused a crack passivation effect after the thermal shock,which could improve the strength and TSR of 3D-printed Al2O3 ceramic.In addition,the effects of MgO content and sintering temperature on sintering behavior,flexural strength,porosity,and TSR of Al2O3 ceram-ics manufactured by digital light processing(DLP)processing were systematically studied.The optimum overall performance of Al2O3 ceramics was obtained at the sintering temperature of 1550 ℃ and the MgO content of 1.0 wt.％,with a maximum flexural strength of 111.929 MPa and a critical temperature difference of 374.24 ℃ for TSR.Based on the above research,an aero-engine swirl nozzle with high ther-mal shock resistance has been successfully prepared by ceramic 3D printing technology,which enhances high-temperature resistance and promotes lightweight design in aero-engine.

3D printingThermal shock resistanceSwirl nozzleFlexural strengthCeramic material

Yuxiang Qiu、Qiaolei Li、Kun Yang、Funan Jin、Jun Fan、Jingjing Liang、Yizhou Zhou、Xiaofeng Sun、Jinguo Li

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Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China

Space Manufacturing Technology(CAS Key Lab),Beijing 100094,China

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National Key Research and Development Program of ChinaNational Defense Basic Scientific Research Program of ChinaNational Natural Science Foundation of ChinaNational Science and Technology Major ProjectNational Key Research and Development Program of ChinaStudents'Innovation and Entrepreneurship Foundation of USTCStudents'Innovation and Entrepreneurship Foundation of USTCFundamental Research Funds for the Central Universities

2017YFA0700704JCKY2022130C005U22A201292017-Ⅵ-0002-00722018YFB1106600CY2022G10CY2022C24WK5290000003

2024

10.1016/j.jmst.2023.09.004

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.178(11)
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