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Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures
Wang SJ; Jia DC; Cui W; Yang ZH; Duan XM; Shao YF(邵颖峰); Zhou Y; Jia, DC (reprint author), Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China.
Source PublicationJOURNAL OF MATERIALS SCIENCE
2013-11
Volume48Issue:22Pages:7974-7980
ISSN0022-2461
AbstractBy gel casting with polymethylmethacrylate microbeads (PMMA) as pore-forming agent, porous boron nitride/silicon nitride (BN/Si3N4) composite ceramics were successfully prepared. The obtained ceramic shows bimodal hierarchical structures that composed of spherical-shaped micro pores depending on PMMA content and irregular sub-micro pores formed by the stacking of ceramic particles. Porosity of the porous BN/Si3N4 ceramics can be well controlled from 53.0 to 60.6 % by the PMMA content from 10 to 40 wt%, as well as the mechanical and dielectric properties. Effect of PMMA content on phase composition and the relationship between microstructure and the basic properties of the porous BN/Si3N4 ceramics was discussed in detail. Microstructure analysis reveals that the sub-micro pores acted as channels between micro pores. BN particles have a relatively denser distribution on the wall of spherical-shaped micro pores with a window between micro and sub-micro pores, and resulting in a half-closed micro pore structure, which is meaningful for material design with concentration of BN particles on the wall of pore structure.
KeywordPorous Silicon-nitride Fibrous Monolithic Ceramics Mechanical-properties Dielectric-properties Composite Ceramics Beta-si3n4 Grains Forming Agent Performance Starch Size
Subject Area复合材料力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000323503900023
Funding OrganizationYangtze Scholars Program in China; National Natural Science Foundation of China (NSFC) [51021002, 51225203]
DepartmentLNM生物材料微结构和力学性能
Classification二类/Q1
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47452
Collection非线性力学国家重点实验室
Corresponding AuthorJia, DC (reprint author), Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China.
Recommended Citation
GB/T 7714
Wang SJ,Jia DC,Cui W,et al. Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures[J]. JOURNAL OF MATERIALS SCIENCE,2013,48(22):7974-7980.
APA Wang SJ.,Jia DC.,Cui W.,Yang ZH.,Duan XM.,...&Jia, DC .(2013).Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures.JOURNAL OF MATERIALS SCIENCE,48(22),7974-7980.
MLA Wang SJ,et al."Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures".JOURNAL OF MATERIALS SCIENCE 48.22(2013):7974-7980.
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