Investigation of curing behavior and mechanical properties of SiC ceramics prepared by vat photopolymerization combined with pressureless liquid-phase sintering using Al2O3-coated SiC powder

被引:8
|
作者
Shi, Zhang-Ao [1 ,2 ]
Wu, Jia-Min [1 ,2 ,3 ]
Fang, Zhi-Qiang [1 ,2 ]
Tian, Chong [1 ,2 ]
Wang, Qi-Wen [1 ,2 ]
Mao, Chen [1 ,2 ]
Fu, Li-Xiang [1 ,2 ]
Shi, Yu-Sheng [1 ,2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[2] Minist Educ, Engn Res Ctr Ceram Mat Addit Mfg, Wuhan 430074, Peoples R China
[3] HUST, Wenzhou Key Lab Microwave Commun Mat & Devices, Wenzhou Adv Mfg Inst, Wenzhou 325035, Peoples R China
基金
中国国家自然科学基金;
关键词
SiC ceramics; Vat photopolymerization; 3D printing; SILICON-CARBIDE; STEREOLITHOGRAPHY; FABRICATION; COMPOSITES; OXIDATION; MICROSTRUCTURE; INFILTRATION; AEROSPACE; SLURRY;
D O I
10.1016/j.addma.2023.103942
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Preparation of SiC ceramics via vat photopolymerization can enhance the use of SiC ceramics in defense, aerospace, and other fields. However, the high ultraviolet absorbance and refractive index of SiC powder present challenges in achieving the desired curing depth for SiC slurry in vat photopolymerization. Additionally, the low sintering activity of SiC powder hinders the densification of 3D-printed SiC ceramics. Consequently, the fabrication of SiC ceramics using vat photopolymerization 3D printing technology encounters significant challenges. This study proposes a method of improving the curing properties of SiC slurry with Al2O3-coated SiC powder. The gap between SiC particles was optimized by incorporating small particle beta-SiC with enhanced sintering activity. The effects of Al2O3 coating modification and beta-SiC percentage in SiC powder system on the UV absorbance of SiC powder, rheology and curing properties of SiC slurries, and sintering properties of SiC ceramics were thoroughly investigated. Furthermore, the density, flexural strength, and elastic modulus of the sintered parts prepared by vat photopolymerization combined with the pressureless liquid-phase sintering process achieve 2.82 +/- 0.07 g/ cm3, 225.3 +/- 13.6 MPa, and 94.9 +/- 5.5 GPa, respectively. These properties are comparable to those of other currently available 3D-printed SiC ceramics but are easier to manipulate and achieve, showcasing its competitiveness.
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页数:11
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