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

被引：20

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

共 26 条

[1] Effect of the hydration sequence orientation on the structural properties of Hg exchanged montmorillonite: Quantitative XRD analysis
Ammar, Marwa
Oueslati, Walid
Ben Rhaiem, Hafsia
Amara, Abdesslem Ben Haj
[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2014, 2 (03) : 1604 - 1611
[2] [Anonymous], 2008, SCI ENG THERMAL SPRA, DOI DOI 10.1002/9780470754085
[3] Davis JR., 2004, HDB THERMAL SPRAY TE
[4] Understanding plasma spraying
Fauchais, P
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2004, 37 (09) : R86 - R108
[5] Tribological behavior of plasma sprayed Al2O3-based cermet coatings
Fervel, V
Normand, B
Coddet, C
[J]. WEAR, 1999, 230 (01) : 70 - 77
[6] Influence of spraying conditions on microstructures of Al-SiCp composites by plasma spraying
Gui, MC
Kang, SB
Euh, K
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (09): : 2471 - 2480
[7] Effects of spray parameters on the microstructure and property of Al2O3 coatings sprayed by a low power plasma torch with a novel hollow cathode
Li, CJ
Sun, B
[J]. THIN SOLID FILMS, 2004, 450 (02) : 282 - 289
[8] Dielectric properties of the SiC fiber-reinforced SiC matrix composites with the CVD SiC interphases
Liu, Haitao
Cheng, Haifeng
Wang, Jun
Tang, Gengping
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 491 (1-2) : 248 - 251
[9] Liu HW, 2007, RARE METAL MAT ENG, V36, P564
[10] Enhanced mechanical, dielectric and microwave absorption properties of cordierite based ceramics by adding Ti3SiC2 powders
Liu, Yi
Luo, Fa
Su, Jinbu
Zhou, Wancheng
Zhu, Dongmei
Li, Zhimin
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 619 : 854 - 860

← 1 2 3 →