期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.01.118
关键词
Mechanical characterization; X-ray diffraction; Ceramics; Composites
类别
资金
- Chinese National Natural Science Foundation [51072165]
- State Key Laboratory of Solidification processing in NWPU [KP200901]
Boron nitride (BN) coatings were successfully synthesized on KD-1 SiC fibers by dip-coating in boric acid and urea solution followed by heat treatment at 1000 degrees C in nitrogen. The SEM micrographs indicated that the BN coating is smooth. The XRD and Raman spectrum results showed that the composition of the coatings is h-BN. The effects of BN interphase on the mechanical properties of 2.5D SiC fiber reinforced CVI-SiC matrix (SiC/SiC) composites were investigated. The results show that the flexural strength of SiCf/SiC composites with and without BN interphase is 170 MPa and 60 MPa, respectively. And, compared to composites without interphase, the SiCf/SiC composites with BN interphase exhibit an obvious toughened fracture behavior. It is indicated that dip-coating BN interphase can effectively adjust the interfacial bonding strength and improve the mechanical properties of SiCf/SiC composites. (C) 2012 Published by Elsevier B.V.
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