TY - JOUR
T1 - Effects of oxidation temperature on microstructure and EMI shielding performance of layered SiC/PyC porous ceramics
AU - Pan, Yu
AU - Liu, Yongsheng
AU - Zhao, Mingxi
AU - Wang, Ning
AU - Wang, Chenhao
AU - He, Sujun
AU - Ye, Fang
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/12
Y1 - 2019/12
N2 - Herein, the influence of oxidation temperature on the oxidation behavior, microstructure and electromagnetic shielding performance of layered porous ceramics has been systematically investigated. Layered SiC/PyC porous ceramics were prepared by using low-pressure chemical vapor infiltration (LPCVI) method. The oxidized SiC/PyC layered porous ceramics exhibited a negligible mass reduction of 11.94 mg·cm−3, which indicates the excellent high-temperature oxidation resistance of porous ceramics. The electromagnetic shielding performance of SiC/PyC porous ceramics did not exhibit any obvious change even after oxidation at high temperature from 900 to 1300 °C for 10 h. The SET of the layered SiC/PyC porous ceramics was 24.1, 20.0, 19.5, 19.0, 19.8 dB after oxidation at 25 °C, 900 °C, 1000 °C, 1100 °C and 1300 °C, which corresponds to a decrease of 17.01%, 19.09%, 21.16% and 17.84%, respectively. The high-temperature oxidation has rendered a more significant influence on the reflection efficiency of the layered SiC/PyC porous ceramics.
AB - Herein, the influence of oxidation temperature on the oxidation behavior, microstructure and electromagnetic shielding performance of layered porous ceramics has been systematically investigated. Layered SiC/PyC porous ceramics were prepared by using low-pressure chemical vapor infiltration (LPCVI) method. The oxidized SiC/PyC layered porous ceramics exhibited a negligible mass reduction of 11.94 mg·cm−3, which indicates the excellent high-temperature oxidation resistance of porous ceramics. The electromagnetic shielding performance of SiC/PyC porous ceramics did not exhibit any obvious change even after oxidation at high temperature from 900 to 1300 °C for 10 h. The SET of the layered SiC/PyC porous ceramics was 24.1, 20.0, 19.5, 19.0, 19.8 dB after oxidation at 25 °C, 900 °C, 1000 °C, 1100 °C and 1300 °C, which corresponds to a decrease of 17.01%, 19.09%, 21.16% and 17.84%, respectively. The high-temperature oxidation has rendered a more significant influence on the reflection efficiency of the layered SiC/PyC porous ceramics.
KW - ANtioxidant properties
KW - Electromagnetic shielding effectiveness
KW - Layered SiC/PyC porous ceramic
KW - Low-pressure chemical vapor infiltration
KW - Oxidation resistance
UR - http://www.scopus.com/inward/record.url?scp=85067977527&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2019.06.047
DO - 10.1016/j.jeurceramsoc.2019.06.047
M3 - 文章
AN - SCOPUS:85067977527
SN - 0955-2219
VL - 39
SP - 4527
EP - 4534
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 15
ER -