Enhanced dielectric and microwave absorption properties of Cr/Al2O3 coatings deposited by low-power plasma spraying

被引：21

作者：

Zhou, Liang ^{[1
,2
,3
]}

Chen, Meng ^{[1
]}

Dong, Yanli ^{[4
]}

Yuan, Zhanwei ^{[1
]}

机构：

[1] Changan Univ, Sch Mat Sci & Engn, Xian, Peoples R China

[2] Univ Toronto, Ctr Adv Coating Technol, Toronto, ON, Canada

[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou, Peoples R China

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

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2017年 / 100卷 / 02期

基金：

中国国家自然科学基金;

关键词：

coatings; plasma spraying; dielectric materials/properties; absorption/absorbents; microstructure; NICRALY/AL2O3; COATINGS; COMPLEX PERMITTIVITY; COMPOSITE COATINGS; CARBON NANOTUBES; MICROSTRUCTURE; PARTICLES; AL;

D O I：

10.1111/jace.14583

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Low-power plasma-sprayed Cr/Al2O3 coatings have been developed for their potential application as broad bandwidth, thin thickness, lightweight, and strong microwave-absorbing materials. The dielectric and microwave absorption properties of the as-sprayed coatings were studied in the X-band (from 8.2 to 12.4GHz). High complex permittivity of the coatings was obtained because of a large number of internal boundaries and the conductive networks. Meanwhile, a significant enhancement of microwave absorption properties of the coating was achieved due to the enhanced interfacial polarization and conductance loss. The reflection loss (RL) <-10dB of the Al2O3-15Cr coating was obtained from 9.8 to 11.4GHz by choosing an appropriate coating thickness, and an optimal minimum reflection loss (RLmin) of -45.35dB was achieved at 10.3GHz with a thin thickness of 1.32mm.

引用

页码：620 / 626

页数：7

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