| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10624721 | Ceramics International | 2015 | 6 Pages |
Abstract
Porous BN/Si3N4 composites with different Y2O3-MgO nanopowders have been fabricated by a pressureless sintering method. The densification, phase evolution, microstructure, mechanical properties and dielectric properties of the BN/Si3N4 composites were investigated. The density and mechanical properties of the porous BN/Si3N4 composite ceramics firstly increased with addition of Y2O3-MgO up to 20Â wt% and then decreased, while the dielectric properties gently declined as the Y2O3-MgO contents increased. For the porous BN/Si3N4 composites with 20Â wt% Y2O3-MgO nanopowders, the porosity, flexural strength and dielectric constant reached 21.9%, 243.6Â MPa and 5.5, respectively, which indicated that the composites could be one of the candidates for wave-transparent applications.
Related Topics
Physical Sciences and Engineering
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Ceramics and Composites
Authors
Yujun Zhao, Yujun Zhang, Hongyu Gong, Xianli Wang, Haibin Sun,