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.

引用

页数：10

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