Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

Abstract Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires. The porosity of the foams can be controlled at 76.3–83.8 vol% with an open porosity of 70.2– 82...

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Main Authors:	Junsheng Li, Qiuping Yu, Duan Li, Liang Zeng, Shitao Gao
Format:	Article
Language:	English
Published:	SpringerOpen 2021-01-01
Series:	Journal of Advanced Ceramics
Subjects:	ceramics sintering porosity mechanical properties permeability
Online Access:	https://doi.org/10.1007/s40145-020-0431-4

id	doaj-830b382747fa4f4083d8d4c654f6140c
record_format	Article
spelling	doaj-830b382747fa4f4083d8d4c654f6140c2021-01-24T12:18:10ZengSpringerOpenJournal of Advanced Ceramics2226-41082227-85082021-01-0110118719310.1007/s40145-020-0431-4Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltrationJunsheng Li0Qiuping Yu1Duan Li2Liang Zeng3Shitao Gao4Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense TechnologyAbstract Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires. The porosity of the foams can be controlled at 76.3–83.8 vol% with an open porosity of 70.2– 82.8 vol%. The pore size distribution was presented in three levels: < 2 μm (voids among grains and cross overlapping of silicon nitride nanowires (SNNWs)), 10–50 μm (cell windows), and >100 μm (cells). The resulted compressive strength of the porous bodies at room temperature can achieve up to 18.0±1.0 MPa (porosity = 76.3 vol%) while the corresponding retention rate at 800 ℃ was 58.3%. Gas permeability value was measured to be 5.16 (cm3·cm)/(cm2·s·kPa). The good strength, high permeability together with the pore structure in multiple scales enabled the foam materials for microparticle infiltration applications.https://doi.org/10.1007/s40145-020-0431-4ceramicssinteringporositymechanical propertiespermeability
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Junsheng Li Qiuping Yu Duan Li Liang Zeng Shitao Gao
spellingShingle	Junsheng Li Qiuping Yu Duan Li Liang Zeng Shitao Gao Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration Journal of Advanced Ceramics ceramics sintering porosity mechanical properties permeability
author_facet	Junsheng Li Qiuping Yu Duan Li Liang Zeng Shitao Gao
author_sort	Junsheng Li
title	Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration
title_short	Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration
title_full	Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration
title_fullStr	Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration
title_full_unstemmed	Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration
title_sort	formation of hierarchical si3n4 foams by protein-based gelcasting and chemical vapor infiltration
publisher	SpringerOpen
series	Journal of Advanced Ceramics
issn	2226-4108 2227-8508
publishDate	2021-01-01
description	Abstract Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires. The porosity of the foams can be controlled at 76.3–83.8 vol% with an open porosity of 70.2– 82.8 vol%. The pore size distribution was presented in three levels: < 2 μm (voids among grains and cross overlapping of silicon nitride nanowires (SNNWs)), 10–50 μm (cell windows), and >100 μm (cells). The resulted compressive strength of the porous bodies at room temperature can achieve up to 18.0±1.0 MPa (porosity = 76.3 vol%) while the corresponding retention rate at 800 ℃ was 58.3%. Gas permeability value was measured to be 5.16 (cm3·cm)/(cm2·s·kPa). The good strength, high permeability together with the pore structure in multiple scales enabled the foam materials for microparticle infiltration applications.
topic	ceramics sintering porosity mechanical properties permeability
url	https://doi.org/10.1007/s40145-020-0431-4
work_keys_str_mv	AT junshengli formationofhierarchicalsi3n4foamsbyproteinbasedgelcastingandchemicalvaporinfiltration AT qiupingyu formationofhierarchicalsi3n4foamsbyproteinbasedgelcastingandchemicalvaporinfiltration AT duanli formationofhierarchicalsi3n4foamsbyproteinbasedgelcastingandchemicalvaporinfiltration AT liangzeng formationofhierarchicalsi3n4foamsbyproteinbasedgelcastingandchemicalvaporinfiltration AT shitaogao formationofhierarchicalsi3n4foamsbyproteinbasedgelcastingandchemicalvaporinfiltration
_version_	1724326095497461760

Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

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