The Influence of SiO2 + SiC + Al (H2PO4)3 Coating on Mechanical and Dielectric Properties for SiCf/MWCNTS/AlPO4 Composites

被引：1
|
作者：
Zhu, Yan [1 ,2 ]
Wan, Feng [1 ,2 ]
Yan, Jianhui [1 ,2 ]
Xu, Hongmei [1 ,2 ]
机构：
[1] Hunan Univ Sci & Technol, Sch Mat Sci & Engn, Xiangtan 411201, Peoples R China
[2] Hunan Univ Sci & Technol, Hunan Prov Key Lab Adv Mat New Energy Storage & C, Xiangtan 411201, Peoples R China
来源：
MATERIALS | 2022年 / 15卷 / 15期
基金：
中国国家自然科学基金;
关键词：
SiC fibers; oxidation; SiP2O7; solid solution; MICROWAVE-ABSORPTION PROPERTIES; OXIDATION BEHAVIOR; TEMPERATURE; COMPOSITES; MATRIX; PROTECTION; RESISTANCE;
D O I：
10.3390/ma15155178
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
SiC fiber-reinforced AlPO4 matrix (SiCf/MWCNTs/AlPO4) composites were fabricated using a hot laminating process with multi-walled carbon nanotubes (MWCNTs) as the absorber. A coating prepared from SiO2 + SiC + Al (H2PO4)(3) was applied to the surface of the SiCf/MWCNTs/AlPO4 composites prior to an anti-oxidation test at 1273 K in air for 40 h. The anti-oxidation effect was verified by a three-point bending test, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and a dielectric property test. Anti-oxidation mechanism investigations revealed that the coating effectiveness could be attributed to three substances, i.e., SiO2, SiP2O7, and SiO2 + AlPO4 solid solution from the reactions of SiC + O-2 -> SiO2 + CO, SiO2 + P2O5 -> SiP2O7 and SiO2 + AlPO4 -> solid solution, respectively.
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页数：10
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