TY - JOUR
T1 - Simultaneous enhancement of mechanical and microwave absorption properties with a novel in-situ synthesis α-Al2O3 fillers for SiCf/SiC composites
AU - Ren, Zhaowen
AU - Zhou, Wancheng
AU - Qing, Yuchang
AU - Xie, Hui
AU - Duan, Shichang
AU - Pan, Haijun
AU - Lu, Xiaoke
AU - Chai, Xia
AU - Ran, Di
AU - Zheng, Yingze
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9
Y1 - 2022/9
N2 - The Al and H3BO3 mixed powder was introduced into the PCS/Xylene precursor solution as in-situ synthesis α-Al2O3 filler by precursor infiltration and pyrolysis (PIP) method. The in-situ synthesis filler can effectively decrease the open porosity of SiCf/SiC composites and give rise to multiple scattering of microwave and dipolar polarization. Therefore, the mechanical and microwave absorption properties of SiCf/SiC composites can be simultaneously enhanced. The effects of in-situ synthesis filler on the morphologies, flexure strength and reflection loss values of SiCf/SiC composites were investigated. With 2 wt% in-situ synthesis filler, the flexure strength of SiCf/SiC composite was 305 MPa and the maximum reflection loss (RLm) can reach − 54.68 dB with the effective absorption band (EAB) of 3.51 GHz in the X band. With 5 wt% in-situ synthesis filler, the flexure strength of SiCf/SiC composite was 207 MPa and the RLm was − 30.91 dB. Due to the inefficient infiltration process, the RLm of SiCf/SiC composites with 10 wt% in-situ synthesis filler was only − 27.36 dB. Nevertheless, the flexure strength of that composite was 259 MPa, owing to the dense matrix. Additionally, the flexure strength of SiCf/SiC composite without filler was 148 MPa and the RLm was − 26.40 dB.
AB - The Al and H3BO3 mixed powder was introduced into the PCS/Xylene precursor solution as in-situ synthesis α-Al2O3 filler by precursor infiltration and pyrolysis (PIP) method. The in-situ synthesis filler can effectively decrease the open porosity of SiCf/SiC composites and give rise to multiple scattering of microwave and dipolar polarization. Therefore, the mechanical and microwave absorption properties of SiCf/SiC composites can be simultaneously enhanced. The effects of in-situ synthesis filler on the morphologies, flexure strength and reflection loss values of SiCf/SiC composites were investigated. With 2 wt% in-situ synthesis filler, the flexure strength of SiCf/SiC composite was 305 MPa and the maximum reflection loss (RLm) can reach − 54.68 dB with the effective absorption band (EAB) of 3.51 GHz in the X band. With 5 wt% in-situ synthesis filler, the flexure strength of SiCf/SiC composite was 207 MPa and the RLm was − 30.91 dB. Due to the inefficient infiltration process, the RLm of SiCf/SiC composites with 10 wt% in-situ synthesis filler was only − 27.36 dB. Nevertheless, the flexure strength of that composite was 259 MPa, owing to the dense matrix. Additionally, the flexure strength of SiCf/SiC composite without filler was 148 MPa and the RLm was − 26.40 dB.
KW - Flexure strength
KW - In-situ synthesis filler
KW - Microwave absorption
KW - SiC/SiC composites
UR - http://www.scopus.com/inward/record.url?scp=85129926382&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2022.04.060
DO - 10.1016/j.jeurceramsoc.2022.04.060
M3 - 文章
AN - SCOPUS:85129926382
SN - 0955-2219
VL - 42
SP - 4723
EP - 4734
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -