Plasma sprayed Al2O3/FeCrAl composite coatings for electromagnetic wave absorption application

被引：55

作者：

Zhou, Liang ^{[1
]}

Zhou, Wancheng ^{[1
]}

Su, Jinbu ^{[1
]}

Luo, Fa ^{[1
]}

Zhu, Dongmei ^{[1
]}

Dong, Yanli ^{[2
]}

机构：

[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2012年 / 258卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Plasma spraying; Dielectric properties; Radar absorbing coating; Al2O3/FeCrAl composite coatings; MICROWAVE-ABSORPTION; DIELECTRIC-RELAXATION; COMPLEX PERMITTIVITY; ABSORBING PROPERTIES; CARBON; FERRITE; PERMEABILITY; FREQUENCIES;

D O I：

10.1016/j.apsusc.2011.10.119

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：

Al2O3/FeCrAl composite coatings were fabricated by atmosphere plasma spraying technique. Microstructure and dielectric properties in the frequency range from 8.2 to 12.4 GHz were investigated. The microstructure of composite coatings shows a uniform dispersion of metal particles with litter pores and microcracks in the composite coatings. The relaxation polarization and interfacial polarization in the coatings would contribute to enhance epsilon' with rising FeCrAl content, and the associated loss could be considered as a dominating factor enhancing epsilon ''. By calculating the microwave-absorption as a single-layer absorber, for the composite coatings with 41 wt.% FeCrAl content, the reflection loss values exceeding -10 dB are achieved in the frequency range of 9.1-10.6 GHz when the coating thickness is 1.3 mm. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

引用

页码：2691 / 2696

页数：6

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