Microwave dielectric properties of low power plasma sprayed NiCrAlY/Al 2O 3 composite coatings

Liang Zhou; Wancheng Zhou; Fa Luo; Jinbu Su; Dongmei Zhu; Yanli Dong

doi:10.1016/j.surfcoat.2012.09.002

Microwave dielectric properties of low power plasma sprayed NiCrAlY/Al ₂O ₃ composite coatings

Liang Zhou, Wancheng Zhou, Fa Luo, Jinbu Su, Dongmei Zhu, Yanli Dong

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

NiCrAlY/Al ₂O ₃ composite coatings were prepared using the low power atmospheric plasma spraying technique. The metal fillers existing in the form of particles and lamellar are randomly distributed within the alumina matrix, which can be confirmed by scanning electronic microscopy. Dielectric measurement showed a significant enhancement of complex permittivity for NiCrAlY/Al ₂O ₃ composite coatings with the increase in NiCrAlY content over the frequency range 8.2-12.4GHz. Both the real (ε') and imaginary (ε″) parts of the complex permittivity increase with increasing NiCrAlY content, which is ascribed to interfacial polarization and conductance loss, respectively. Furthermore, strong frequency dispersion was observed for the composite coatings with 36wt.% NiCrAlY.

Original language	English
Pages (from-to)	122-126
Number of pages	5
Journal	Surface and Coatings Technology
Volume	210
DOIs	https://doi.org/10.1016/j.surfcoat.2012.09.002
State	Published - 15 Oct 2012

Keywords

Dielectric properties
Microstructure
NiCrAlY/Al O composite coatings
Plasma spraying

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10.1016/j.surfcoat.2012.09.002

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title = "Microwave dielectric properties of low power plasma sprayed NiCrAlY/Al 2O 3 composite coatings",

abstract = "NiCrAlY/Al 2O 3 composite coatings were prepared using the low power atmospheric plasma spraying technique. The metal fillers existing in the form of particles and lamellar are randomly distributed within the alumina matrix, which can be confirmed by scanning electronic microscopy. Dielectric measurement showed a significant enhancement of complex permittivity for NiCrAlY/Al 2O 3 composite coatings with the increase in NiCrAlY content over the frequency range 8.2-12.4GHz. Both the real (ε') and imaginary (ε″) parts of the complex permittivity increase with increasing NiCrAlY content, which is ascribed to interfacial polarization and conductance loss, respectively. Furthermore, strong frequency dispersion was observed for the composite coatings with 36wt.% NiCrAlY.",

keywords = "Dielectric properties, Microstructure, NiCrAlY/Al O composite coatings, Plasma spraying",

author = "Liang Zhou and Wancheng Zhou and Fa Luo and Jinbu Su and Dongmei Zhu and Yanli Dong",

year = "2012",

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doi = "10.1016/j.surfcoat.2012.09.002",

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volume = "210",

pages = "122--126",

journal = "Surface and Coatings Technology",

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TY - JOUR

T1 - Microwave dielectric properties of low power plasma sprayed NiCrAlY/Al 2O 3 composite coatings

AU - Zhou, Liang

AU - Zhou, Wancheng

AU - Luo, Fa

AU - Su, Jinbu

AU - Zhu, Dongmei

AU - Dong, Yanli

PY - 2012/10/15

Y1 - 2012/10/15

N2 - NiCrAlY/Al 2O 3 composite coatings were prepared using the low power atmospheric plasma spraying technique. The metal fillers existing in the form of particles and lamellar are randomly distributed within the alumina matrix, which can be confirmed by scanning electronic microscopy. Dielectric measurement showed a significant enhancement of complex permittivity for NiCrAlY/Al 2O 3 composite coatings with the increase in NiCrAlY content over the frequency range 8.2-12.4GHz. Both the real (ε') and imaginary (ε″) parts of the complex permittivity increase with increasing NiCrAlY content, which is ascribed to interfacial polarization and conductance loss, respectively. Furthermore, strong frequency dispersion was observed for the composite coatings with 36wt.% NiCrAlY.

AB - NiCrAlY/Al 2O 3 composite coatings were prepared using the low power atmospheric plasma spraying technique. The metal fillers existing in the form of particles and lamellar are randomly distributed within the alumina matrix, which can be confirmed by scanning electronic microscopy. Dielectric measurement showed a significant enhancement of complex permittivity for NiCrAlY/Al 2O 3 composite coatings with the increase in NiCrAlY content over the frequency range 8.2-12.4GHz. Both the real (ε') and imaginary (ε″) parts of the complex permittivity increase with increasing NiCrAlY content, which is ascribed to interfacial polarization and conductance loss, respectively. Furthermore, strong frequency dispersion was observed for the composite coatings with 36wt.% NiCrAlY.

KW - Dielectric properties

KW - Microstructure

KW - NiCrAlY/Al O composite coatings

KW - Plasma spraying

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U2 - 10.1016/j.surfcoat.2012.09.002

DO - 10.1016/j.surfcoat.2012.09.002

M3 - 文章

AN - SCOPUS:84867446873

SN - 0257-8972

VL - 210

SP - 122

EP - 126

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Microwave dielectric properties of low power plasma sprayed NiCrAlY/Al ₂O ₃ composite coatings

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Keywords

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