Improved properties of scandia and yttria co-doped zirconia as a potential thermal barrier material for high temperature applications

W. Fan; Z. Z. Wang; Y. Bai; J. W. Che; R. J. Wang; F. Ma; W. Z. Tao; G. Y. Liang

doi:10.1016/j.jeurceramsoc.2018.06.002

Improved properties of scandia and yttria co-doped zirconia as a potential thermal barrier material for high temperature applications

W. Fan
, Z. Z. Wang
, Y. Bai
, J. W. Che
, R. J. Wang
, F. Ma
, W. Z. Tao
, G. Y. Liang

School of Materials Science and Engineering

Xi'an Jiaotong University
Beijing Jinlunkuntian Special Machine Co., Ltd
Jiangsu Lida Hi-Tech Special Material Co., Ltd

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

87 Scopus citations

Abstract

Due to the limited temperature capability of current YSZ thermal barrier coating (TBC) material, considerable effort has been expended world-wide to research new candidates for TBC applications above 1200 °C. Our study suggested that Sc₂O₃ and Y₂O₃ co-doped ZrO₂ (ScYSZ) had excellent t’ phase stability even after annealed at 1500 °C for 336 h. The thermal expansion coefficient of ScYSZ was comparable to the value of YSZ. The thermal conductivity of fully dense ScYSZ was in the range of 2.13–1.91 W m⁻¹ K⁻¹ (25–1300 °C), approximately 25% lower than that of YSZ. Although the fracture toughness of dense ScYSZ was slightly lower than YSZ, an evident decline in elastic modulus was found. Additionally, thermal cycling lifetime of plasma sprayed ScYSZ coating (914 cycles) at 1300 °C was about 2.6 times longer than its YSZ counterpart. The superior comprehensive properties confirm that ScYSZ is a prospective candidate material for high-temperature TBC application.

Original language	English
Pages (from-to)	4502-4511
Number of pages	10
Journal	Journal of the European Ceramic Society
Volume	38
Issue number	13
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.06.002
State	Published - Oct 2018

Keywords

Mechanical properties
Non-transformable tetragonal phase stability
Thermal barrier coatings
Thermal cycling life
Thermo-physical properties

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10.1016/j.jeurceramsoc.2018.06.002

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title = "Improved properties of scandia and yttria co-doped zirconia as a potential thermal barrier material for high temperature applications",

abstract = "Due to the limited temperature capability of current YSZ thermal barrier coating (TBC) material, considerable effort has been expended world-wide to research new candidates for TBC applications above 1200 °C. Our study suggested that Sc2O3 and Y2O3 co-doped ZrO2 (ScYSZ) had excellent t{\textquoteright} phase stability even after annealed at 1500 °C for 336 h. The thermal expansion coefficient of ScYSZ was comparable to the value of YSZ. The thermal conductivity of fully dense ScYSZ was in the range of 2.13–1.91 W m−1 K−1 (25–1300 °C), approximately 25\% lower than that of YSZ. Although the fracture toughness of dense ScYSZ was slightly lower than YSZ, an evident decline in elastic modulus was found. Additionally, thermal cycling lifetime of plasma sprayed ScYSZ coating (914 cycles) at 1300 °C was about 2.6 times longer than its YSZ counterpart. The superior comprehensive properties confirm that ScYSZ is a prospective candidate material for high-temperature TBC application.",

keywords = "Mechanical properties, Non-transformable tetragonal phase stability, Thermal barrier coatings, Thermal cycling life, Thermo-physical properties",

author = "W. Fan and Wang, \{Z. Z.\} and Y. Bai and Che, \{J. W.\} and Wang, \{R. J.\} and F. Ma and Tao, \{W. Z.\} and Liang, \{G. Y.\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = oct,

doi = "10.1016/j.jeurceramsoc.2018.06.002",

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T1 - Improved properties of scandia and yttria co-doped zirconia as a potential thermal barrier material for high temperature applications

AU - Fan, W.

AU - Wang, Z. Z.

AU - Bai, Y.

AU - Che, J. W.

AU - Wang, R. J.

AU - Ma, F.

AU - Tao, W. Z.

AU - Liang, G. Y.

PY - 2018/10

Y1 - 2018/10

N2 - Due to the limited temperature capability of current YSZ thermal barrier coating (TBC) material, considerable effort has been expended world-wide to research new candidates for TBC applications above 1200 °C. Our study suggested that Sc2O3 and Y2O3 co-doped ZrO2 (ScYSZ) had excellent t’ phase stability even after annealed at 1500 °C for 336 h. The thermal expansion coefficient of ScYSZ was comparable to the value of YSZ. The thermal conductivity of fully dense ScYSZ was in the range of 2.13–1.91 W m−1 K−1 (25–1300 °C), approximately 25% lower than that of YSZ. Although the fracture toughness of dense ScYSZ was slightly lower than YSZ, an evident decline in elastic modulus was found. Additionally, thermal cycling lifetime of plasma sprayed ScYSZ coating (914 cycles) at 1300 °C was about 2.6 times longer than its YSZ counterpart. The superior comprehensive properties confirm that ScYSZ is a prospective candidate material for high-temperature TBC application.

AB - Due to the limited temperature capability of current YSZ thermal barrier coating (TBC) material, considerable effort has been expended world-wide to research new candidates for TBC applications above 1200 °C. Our study suggested that Sc2O3 and Y2O3 co-doped ZrO2 (ScYSZ) had excellent t’ phase stability even after annealed at 1500 °C for 336 h. The thermal expansion coefficient of ScYSZ was comparable to the value of YSZ. The thermal conductivity of fully dense ScYSZ was in the range of 2.13–1.91 W m−1 K−1 (25–1300 °C), approximately 25% lower than that of YSZ. Although the fracture toughness of dense ScYSZ was slightly lower than YSZ, an evident decline in elastic modulus was found. Additionally, thermal cycling lifetime of plasma sprayed ScYSZ coating (914 cycles) at 1300 °C was about 2.6 times longer than its YSZ counterpart. The superior comprehensive properties confirm that ScYSZ is a prospective candidate material for high-temperature TBC application.

KW - Mechanical properties

KW - Non-transformable tetragonal phase stability

KW - Thermal barrier coatings

KW - Thermal cycling life

KW - Thermo-physical properties

UR - https://www.scopus.com/pages/publications/85047849195

U2 - 10.1016/j.jeurceramsoc.2018.06.002

DO - 10.1016/j.jeurceramsoc.2018.06.002

M3 - 文章

AN - SCOPUS:85047849195

SN - 0955-2219

VL - 38

SP - 4502

EP - 4511

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 13

ER -

Improved properties of scandia and yttria co-doped zirconia as a potential thermal barrier material for high temperature applications

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Keywords

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