SiO + SiC + Al (HPO) 涂层对SiC/MWCNTs/AlPO复合材料力学性能和介电性能的影响

The Influence of SiO + SiC + Al (HPO) Coating on Mechanical and Dielectric Properties for SiC/MWCNTS/AlPO Composites.

作者信息

Zhu Yan, Wan Feng, Yan Jianhui, Xu Hongmei

机构信息

School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.

Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan 411201, China.

出版信息

Materials (Basel). 2022 Jul 26;15(15):5178. doi: 10.3390/ma15155178.

DOI:10.3390/ma15155178

PMID:35897610

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9329869/

Abstract

SiC fiber-reinforcedAlPO matrix (SiC/MWCNTs/AlPO) composites were fabricated using a hot laminating process with multi-walled carbon nanotubes (MWCNTs) as the absorber. A coating prepared from SiO + SiC + Al (HPO) was applied to the surface of the SiC/MWCNTs/AlPO 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., SiO, SiPO and SiO +AlPO solid solution from the reactions of SiC + O→SiO + CO, SiO + PO→SiPO and SiO +AlPO→solid solution, respectively.

摘要

采用热层压工艺，以多壁碳纳米管（MWCNTs）作为吸收剂制备了碳化硅纤维增强磷酸铝基体（SiC/MWCNTs/AlPO）复合材料。在1273K空气中进行40小时抗氧化试验之前，将由SiO + SiC + Al（HPO）制备的涂层涂覆在SiC/MWCNTs/AlPO复合材料表面。通过三点弯曲试验、扫描电子显微镜、透射电子显微镜、X射线衍射和介电性能测试来验证抗氧化效果。抗氧化机理研究表明，涂层的有效性可归因于三种物质，即分别由SiC + O→SiO + CO、SiO + PO→SiPO和SiO + AlPO→固溶体反应生成的SiO、SiPO和SiO + AlPO固溶体。