Lanthanum-titanium-aluminum oxide: A novel thermal barrier coating material for applications at 1300°C

Xiaoyun Xie; Hongbo Guo; Shengkai Gong; Huibin Xu

doi:10.1016/j.jeurceramsoc.2011.03.036

Lanthanum-titanium-aluminum oxide: A novel thermal barrier coating material for applications at 1300°C

Xiaoyun Xie
, Hongbo Guo^*
, Shengkai Gong
, Huibin Xu

^*Corresponding author for this work

School of Aeronautic Science and Engineering
Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)

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

137 Scopus citations

Abstract

Considerable efforts are being invested to explore new thermal barrier coating (TBC) materials with higher temperature capability to meet the demand of advanced turbine engines. In this work, LaTi₂Al₉O₁₉ (LTA) is proposed and investigated as a novel TBC material for application at 1300°C. LTA showed excellent phase stability up to 1600°C. The thermal conductivities for LTA coating are in a range of 1.0-1.3Wm^-1K^-1 (300-1500°C) and the values of thermal expansion coefficients increase from 8.0 to 11.2×10^-6K^-1 (200-1400°C), which are comparable to those of yttria stabilized zirconia (YSZ). The microhardness of LTA and YSZ coatings were in the similar level of ∼7GPa, however, the fracture toughness value was relatively lower than that of YSZ. The lower fracture toughness was compensated by the double-ceramic LTA/YSZ layer design, and the LTA/YSZ TBC exhibited desirable thermal cycling life of nearly 700h at 1300°C.

Original language	English
Pages (from-to)	1677-1683
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	31
Issue number	9
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.03.036
State	Published - Aug 2011
Externally published	Yes

Keywords

Mechanical properties
Thermal barrier coatings
Thermal conductivity
Thermal expansion
Thermal shock resistance

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10.1016/j.jeurceramsoc.2011.03.036

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title = "Lanthanum-titanium-aluminum oxide: A novel thermal barrier coating material for applications at 1300°C",

abstract = "Considerable efforts are being invested to explore new thermal barrier coating (TBC) materials with higher temperature capability to meet the demand of advanced turbine engines. In this work, LaTi2Al9O19 (LTA) is proposed and investigated as a novel TBC material for application at 1300°C. LTA showed excellent phase stability up to 1600°C. The thermal conductivities for LTA coating are in a range of 1.0-1.3Wm-1K-1 (300-1500°C) and the values of thermal expansion coefficients increase from 8.0 to 11.2×10-6K-1 (200-1400°C), which are comparable to those of yttria stabilized zirconia (YSZ). The microhardness of LTA and YSZ coatings were in the similar level of ∼7GPa, however, the fracture toughness value was relatively lower than that of YSZ. The lower fracture toughness was compensated by the double-ceramic LTA/YSZ layer design, and the LTA/YSZ TBC exhibited desirable thermal cycling life of nearly 700h at 1300°C.",

keywords = "Mechanical properties, Thermal barrier coatings, Thermal conductivity, Thermal expansion, Thermal shock resistance",

author = "Xiaoyun Xie and Hongbo Guo and Shengkai Gong and Huibin Xu",

year = "2011",

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doi = "10.1016/j.jeurceramsoc.2011.03.036",

language = "英语",

volume = "31",

pages = "1677--1683",

journal = "Journal of the European Ceramic Society",

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T2 - A novel thermal barrier coating material for applications at 1300°C

AU - Xie, Xiaoyun

AU - Guo, Hongbo

AU - Gong, Shengkai

AU - Xu, Huibin

PY - 2011/8

Y1 - 2011/8

N2 - Considerable efforts are being invested to explore new thermal barrier coating (TBC) materials with higher temperature capability to meet the demand of advanced turbine engines. In this work, LaTi2Al9O19 (LTA) is proposed and investigated as a novel TBC material for application at 1300°C. LTA showed excellent phase stability up to 1600°C. The thermal conductivities for LTA coating are in a range of 1.0-1.3Wm-1K-1 (300-1500°C) and the values of thermal expansion coefficients increase from 8.0 to 11.2×10-6K-1 (200-1400°C), which are comparable to those of yttria stabilized zirconia (YSZ). The microhardness of LTA and YSZ coatings were in the similar level of ∼7GPa, however, the fracture toughness value was relatively lower than that of YSZ. The lower fracture toughness was compensated by the double-ceramic LTA/YSZ layer design, and the LTA/YSZ TBC exhibited desirable thermal cycling life of nearly 700h at 1300°C.

AB - Considerable efforts are being invested to explore new thermal barrier coating (TBC) materials with higher temperature capability to meet the demand of advanced turbine engines. In this work, LaTi2Al9O19 (LTA) is proposed and investigated as a novel TBC material for application at 1300°C. LTA showed excellent phase stability up to 1600°C. The thermal conductivities for LTA coating are in a range of 1.0-1.3Wm-1K-1 (300-1500°C) and the values of thermal expansion coefficients increase from 8.0 to 11.2×10-6K-1 (200-1400°C), which are comparable to those of yttria stabilized zirconia (YSZ). The microhardness of LTA and YSZ coatings were in the similar level of ∼7GPa, however, the fracture toughness value was relatively lower than that of YSZ. The lower fracture toughness was compensated by the double-ceramic LTA/YSZ layer design, and the LTA/YSZ TBC exhibited desirable thermal cycling life of nearly 700h at 1300°C.

KW - Mechanical properties

KW - Thermal barrier coatings

KW - Thermal conductivity

KW - Thermal expansion

KW - Thermal shock resistance

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U2 - 10.1016/j.jeurceramsoc.2011.03.036

DO - 10.1016/j.jeurceramsoc.2011.03.036

M3 - 文章

AN - SCOPUS:79955470633

SN - 0955-2219

VL - 31

SP - 1677

EP - 1683

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 9

ER -

Lanthanum-titanium-aluminum oxide: A novel thermal barrier coating material for applications at 1300°C

Abstract

Keywords

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