3D printing of polymer-derived SiOC with hierarchical and tunable porosity

被引：69
|
作者：
Huang, Kai [1 ]
Elsayed, Hamada [1 ,2 ]
Franchin, Giorgia [1 ]
Colombo, Paolo [1 ,3 ]
机构：
[1] Univ Padua, Dept Ind Engn, I-35131 Padua, Italy
[2] Natl Res Ctr, Ceram Dept, El Bohous St, Cairo 12622, Egypt
[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
ADDITIVE MANUFACTURING | 2020年 / 36卷 / 36期
关键词：
Preceramic polymers; SiOC; Hierarchical porosity; Additive manufacturing; POROUS CERAMICS; MECHANICAL-PROPERTIES; SOL-GEL; FOAMS; SCAFFOLDS; PERFORMANCE; MONOLITHS;
D O I：
10.1016/j.addma.2020.101549
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A facile and controllable method for the fabrication of SiOC ceramic components with hierarchical porosity is reported in this work, using additive manufacturing, sacrificial polymeric microbeads and a silicone resin. Particles-containing inks with suitable rheology enabled the fabrication by Direct Ink Writing of scaffolds with mm-scale macropores between filaments, and um-scale and/or nm pores within the filaments. Isotropic shrinkage and an appropriate pyrolysis program enabled to obtain scaffolds without defects and shape distortions. Total porosity and compression strength depended on the content and size of the PMMA particles in the inks, enabling the fabrication of SiOC ceramic with components possessing a remarkable strength up to 2.92 MPa for a total porosity of 86.5 vol% by the addition of 5 mu m PMMA particles.
引用
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页数：10
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