浆料固相含量对数字光处理成形SiO2基陶瓷性能的影响

doi:10.3901/JME.2023.01.259

机械工程学报 ›› 2023, Vol. 59 ›› Issue (1): 259-266.doi: 10.3901/JME.2023.01.259

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浆料固相含量对数字光处理成形SiO₂基陶瓷性能的影响

于康博^1,2,3, 吴甲民^1,2,3, 郑雯^1,2,3, 陈双^1,2,3, 张洁^1,2,3, 刘珩^1,2,3, 文世峰^1,2,3, 闫春泽^1,2,3, 史玉升^1,2,3

1. 华中科技大学材料科学与工程学院武汉 430074;
2. 华中科技大学材料成形与模具技术国家重点实验室武汉 430074;
3. 增材制造陶瓷材料教育部工程研究中心武汉 430074

收稿日期:2022-05-24 修回日期:2022-11-06 出版日期:2023-01-05 发布日期:2023-03-30
通讯作者: 吴甲民(通信作者),男,1984年出生,博士,副教授,博士研究生导师。主要研究方向为陶瓷的增材制造技术及其应用。E-mail:jiaminwu@hust.edu.cn
作者简介:于康博,男,1997年出生。主要研究方向为硅基陶瓷的增材制造技术。E-mail:1024425057@qq.com
基金资助:
国家科技重大专项资助项目（2017-Ⅶ-0008-0102-1）。

Effect of Solid Loading of Slurry on Properties of SiO₂-based Ceramics Formed by Digital Light Processing

YU Kangbo^1,2,3, WU Jiamin^1,2,3, ZHENG Wen^1,2,3, CHEN Shuang^1,2,3, ZHANG Jie^1,2,3, LIU Heng^1,2,3, WEN Shifeng^1,2,3, YAN Chunze^1,2,3, SHI Yusheng^1,2,3

1. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074;
2. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074;
3. Engineering Research Center of Ceramic Materials for Additive Manufacturing of Ministry of Education, Wuhan 430074

Received:2022-05-24 Revised:2022-11-06 Online:2023-01-05 Published:2023-03-30

摘要/Abstract

摘要： 随着国内外航空航天事业的快速发展，硅基陶瓷型芯在制备发动机涡轮叶片中起到越来越重要的作用。本工作以氧化硅（SiO₂）粉末和硅酸锆（ZrSiO₄）粉末为原材料，通过数字光处理技术（Digital light processing，DLP）制备SiO₂基陶瓷，主要研究了陶瓷浆料固相含量对DLP成形SiO₂基陶瓷微观组织和性能的影响。随着陶瓷浆料固相含量（体积分数）从50%增加到65%，SiO₂基陶瓷中由石英玻璃转变形成的方石英含量逐渐下降，烧结件的晶粒孔隙逐渐减少。DLP成形SiO₂基陶瓷的径向收缩率由4.65%下降至1.61%，轴向收缩率由8.35%下降至4.17%；而SiO₂基陶瓷的体积密度逐渐提高，气孔率逐渐减小，抗弯强度逐渐上升。最终确定陶瓷浆料的最佳固相含量为65%，此时SiO₂基陶瓷的气孔率为25.4%，室温抗弯强度为9.3 MPa，满足硅基陶瓷型芯的性能要求。

关键词: 氧化硅, 陶瓷型芯, 数字光处理, 固相含量, 抗弯强度

Abstract: With the rapid development of aerospace industry, ceramic cores play an important role in the preparation of engine turbine blades. In this work, silica (SiO₂) powder and zirconium silicate (ZrSiO₄) powder are used as raw materials to prepare SiO₂-based ceramics by digital light processing (DLP), and the effects of solid loading of ceramic slurry on the microstructure and properties of SiO₂-based ceramics formed by DLP are mainly studied. With the increase of solid loading from 50 vol% to 65 vol%, the content of cristobalite formed by quartz glass transition in SiO₂-based ceramics gradually decreases, and the pores of sintered parts decrease significantly. The radial shrinkage of SiO₂-based ceramics decreases from 4.65% to 1.61%, and the axial shrinkage decreases from 8.35% to 4.17%; The bulk density and the flexural strength of SiO₂-based ceramics increase gradually, while the porosity decreases. Finally, the optimum solid loading of ceramic slurry is 65 vol%. Meanwhile, the porosity of SiO₂-based ceramics is 25.4% and the room-temperature flexural strength is 9.3 MPa, which meets the performance requirements of SiO₂-based ceramic core.

Key words: SiO₂, ceramic cores, digital light processing, solid loading, flexural strength

中图分类号:

TQ174

于康博, 吴甲民, 郑雯, 陈双, 张洁, 刘珩, 文世峰, 闫春泽, 史玉升. 浆料固相含量对数字光处理成形SiO₂基陶瓷性能的影响[J]. 机械工程学报, 2023, 59(1): 259-266.

YU Kangbo, WU Jiamin, ZHENG Wen, CHEN Shuang, ZHANG Jie, LIU Heng, WEN Shifeng, YAN Chunze, SHI Yusheng. Effect of Solid Loading of Slurry on Properties of SiO₂-based Ceramics Formed by Digital Light Processing[J]. Journal of Mechanical Engineering, 2023, 59(1): 259-266.

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浆料固相含量对数字光处理成形SiO₂基陶瓷性能的影响

Effect of Solid Loading of Slurry on Properties of SiO₂-based Ceramics Formed by Digital Light Processing

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