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- Title
Mechanical and Microwave‐Absorption Properties of Si<sub>3</sub>N<sub>4</sub> Ceramic with SiCNFs Fillers.
- Authors
Zhou, Wei; Long, Lan; Bu, Guobin; Li, Yang
- Abstract
Aiming to optimize the mechanical and microwave absorption properties of Si3N4 ceramics, SiC nanofibers (SiCNFs) are introduced into Si3N4 ceramics by gel casting. The results indicate that flexural strength of as‐prepared Si3N4‐based ceramics decreases from 362 to 284.2 MPa, while the fracture toughness increases from 3.4 to 5.2 MPa · m1/2, as the SiCNFs fillers in the Si3N4 matrix increase from 0 to 8 wt%. Moreover, both complex permittivity and dielectric loss are significantly enhanced after introduction of SiCNFs fillers into Si3N4 ceramics. The investigation of microwave absorption demonstrates that much enhanced microwave attenuation abilities is achieved in the Si3N4 ceramics with different content of SiCNFs fillers. Especially, the Si3N4 ceramics with 8 wt% SiCNFs fillers exhibit excellent microwave absorption properties at thin thickness, indicating favorable potential application as high‐performance microwave absorbing materials.
- Subjects
MICROWAVE materials; MICROWAVE attenuation; GELCASTING; CERAMICS; DIELECTRIC loss; MICROWAVE sintering
- Publication
Advanced Engineering Materials, 2019, Vol 21, Issue 5, pN.PAG
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201800665