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

被引：1
作者：
Yu K. [1 ,2 ,3 ]
Wu J. [1 ,2 ,3 ]
Zheng W. [1 ,2 ,3 ]
Chen S. [1 ,2 ,3 ]
Zhang J. [1 ,2 ,3 ]
Liu H. [1 ,2 ,3 ]
Wen S. [1 ,2 ,3 ]
Yan C. [1 ,2 ,3 ]
Shi Y. [1 ,2 ,3 ]
机构：
[1] School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan
[2] State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan
[3] Engineering Research Center of Ceramic Materials for Additive Manufacturing of Ministry of Education, Wuhan
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2023年 / 59卷 / 01期
关键词：
ceramic cores; digital light processing; flexural strength; SiO[!sub]2[!/sub; solid loading;
D O I：
10.3901/JME.2023.01.259
中图分类号：
学科分类号：
摘要：
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. © 2023 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：259 / 266
页数：7
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