Powder extrusion printing of silicon carbide ceramics: Optimization of water-soluble binder systems and sintering properties

被引:1
作者
Liao, Shengjun [1 ,2 ]
Chen, Jian [1 ]
Huang, Changcong [1 ,2 ]
Gao, Chenxi [1 ,2 ]
Peng, Lan [1 ,3 ]
Huang, Zhengren [1 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
基金
中国国家自然科学基金;
关键词
3D printing; Powder extrusion; SiC ceramics; Water-soluble binder; Reactive sintering; INJECTION-MOLDED COMPACTS; ENTANGLEMENT CONCEPT; MOLECULAR-WEIGHT; ZIRCONIA PARTS; VISCOSITY; KINETICS; POLYSTYRENE; DEPENDENCE; POLYMERS; BEHAVIOR;
D O I
10.1016/j.jeurceramsoc.2024.117167
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A two-step debinding process, consisting of solvent debinding followed by thermal debinding has been demonstrated as an effective method for removing binders from green parts produced by powder extrusion printing. However, the organic solvents typically used in solvent debinding are often flammable, carcinogenic, and environmentally harmful. To address this issue, this study introduced a water-soluble binder system composed of polyvinyl alcohol (PVA), polymethyl methacrylate (PMMA), and ethyl vinyl acetate (EVA), specifically designed for fabricating silicon carbide (SiC) ceramic green parts via PEP. During water-based debinding, a large amount of PVA was removed, leaving micro-pores in the green part. These pores served as channels for the remaining binder to escape during thermal debinding. Subsequent processing involving phenolic resin impregnation and pyrolysis (PRIP), followed by liquid silicon infiltration (LSI), resulted in Si/SiC ceramics with a density of 2.83 +/- 0.09 g/cm3 and a strength of 279.5 +/- 8.4 MPa.
引用
收藏
页数:15
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