Thermal conductivity and phase stability of plasma sprayed ZrO2-Y2O3-La2O3 coatings

M. Matsumoto; K. Aoyama; H. Matsubara; K. Takayama; T. Banno; Y. Kagiya; Y. Sugita

doi:10.1016/j.surfcoat.2004.04.078

Thermal conductivity and phase stability of plasma sprayed ZrO₂-Y₂O₃-La₂O₃ coatings

M. Matsumoto, K. Aoyama, H. Matsubara, K. Takayama, T. Banno, Y. Kagiya, Y. Sugita

ENV - Environmental Studies for Advanced Society

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

87 Citations (Scopus)

Abstract

Thermal conductivity and phase stability of La₂O₃, Y₂O₃ stabilized ZrO₂ plasma sprayed coatings were investigated. La₂O₃ was selected as a stabilizer because it had a significant effect on reducing densification of Y₂O₃ stabilized ZrO₂ (YSZ). The developed coating showed low thermal conductivity even after high temperature exposure due to its high resistance to sintering. However, phase stability and thermal cycle life of the coating decreased as the amount of La₂O₃ was increased. It was concluded that optimum amount of La₂O₃ addition was about 1 mol% to suppress sintering with little degradation of other properties.

Original language	English
Pages (from-to)	31-35
Number of pages	5
Journal	Surface and Coatings Technology
Volume	194
Issue number	1
DOIs	https://doi.org/10.1016/j.surfcoat.2004.04.078
Publication status	Published - 2005 Apr 20

Keywords

Lanthania
Phase stability
Sintering
Thermal barrier coating (TBC)
Thermal conductivity
Yttria stabilized zirconia (YSZ)

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.surfcoat.2004.04.078

Cite this

@article{7405034d88054577bec9f3f713604468,

title = "Thermal conductivity and phase stability of plasma sprayed ZrO2-Y2O3-La2O3 coatings",

abstract = "Thermal conductivity and phase stability of La2O3, Y2O3 stabilized ZrO2 plasma sprayed coatings were investigated. La2O3 was selected as a stabilizer because it had a significant effect on reducing densification of Y2O3 stabilized ZrO2 (YSZ). The developed coating showed low thermal conductivity even after high temperature exposure due to its high resistance to sintering. However, phase stability and thermal cycle life of the coating decreased as the amount of La2O3 was increased. It was concluded that optimum amount of La2O3 addition was about 1 mol% to suppress sintering with little degradation of other properties.",

keywords = "Lanthania, Phase stability, Sintering, Thermal barrier coating (TBC), Thermal conductivity, Yttria stabilized zirconia (YSZ)",

author = "M. Matsumoto and K. Aoyama and H. Matsubara and K. Takayama and T. Banno and Y. Kagiya and Y. Sugita",

year = "2005",

month = apr,

day = "20",

doi = "10.1016/j.surfcoat.2004.04.078",

language = "English",

volume = "194",

pages = "31--35",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Thermal conductivity and phase stability of plasma sprayed ZrO2-Y2O3-La2O3 coatings

AU - Matsumoto, M.

AU - Aoyama, K.

AU - Matsubara, H.

AU - Takayama, K.

AU - Banno, T.

AU - Kagiya, Y.

AU - Sugita, Y.

PY - 2005/4/20

Y1 - 2005/4/20

N2 - Thermal conductivity and phase stability of La2O3, Y2O3 stabilized ZrO2 plasma sprayed coatings were investigated. La2O3 was selected as a stabilizer because it had a significant effect on reducing densification of Y2O3 stabilized ZrO2 (YSZ). The developed coating showed low thermal conductivity even after high temperature exposure due to its high resistance to sintering. However, phase stability and thermal cycle life of the coating decreased as the amount of La2O3 was increased. It was concluded that optimum amount of La2O3 addition was about 1 mol% to suppress sintering with little degradation of other properties.

AB - Thermal conductivity and phase stability of La2O3, Y2O3 stabilized ZrO2 plasma sprayed coatings were investigated. La2O3 was selected as a stabilizer because it had a significant effect on reducing densification of Y2O3 stabilized ZrO2 (YSZ). The developed coating showed low thermal conductivity even after high temperature exposure due to its high resistance to sintering. However, phase stability and thermal cycle life of the coating decreased as the amount of La2O3 was increased. It was concluded that optimum amount of La2O3 addition was about 1 mol% to suppress sintering with little degradation of other properties.

KW - Lanthania

KW - Phase stability

KW - Sintering

KW - Thermal barrier coating (TBC)

KW - Thermal conductivity

KW - Yttria stabilized zirconia (YSZ)

UR - http://www.scopus.com/inward/record.url?scp=13644281590&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=13644281590&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2004.04.078

DO - 10.1016/j.surfcoat.2004.04.078

M3 - Article

AN - SCOPUS:13644281590

SN - 0257-8972

VL - 194

SP - 31

EP - 35

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 1

ER -