Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition

Wen Ma; Shengkai Gong; Hefei Li; Huibin Xu

doi:10.1016/j.surfcoat.2007.09.047

Novel thermal barrier coatings based on La₂Ce₂O₇/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition

Wen Ma^*
, Shengkai Gong
, Hefei Li
, Huibin Xu

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

109 Scopus citations

Abstract

Novel thermal barrier coatings based on La₂Ce₂O₇/8YSZ double-ceramic-layer (DCL) systems, which were deposited by electron beam physical vapor deposition (EB-PVD), were found to have a longer lifetime compared to the single layer La₂Ce₂O₇ (LC) system, and even much longer than that of the single layer 8YSZ system under burner rig test. The DCL coating structure design can effectively alleviate the thermal expansion mismatch between LC coating and bond coat, as well as avoid the chemical reaction between LC and Al₂O₃ in thermally grown oxide (TGO), which occurs above 1000 °C as determined by differential scanning calorimetry (DSC) analysis. The failure mechanism of LC/8YSZ DCL coating is mainly due to the sintering of LC coating surface after long-term thermal cycling.

Original language	English
Pages (from-to)	2704-2708
Number of pages	5
Journal	Surface and Coatings Technology
Volume	202
Issue number	12
DOIs	https://doi.org/10.1016/j.surfcoat.2007.09.047
State	Published - 15 Mar 2008

Keywords

CeO
Electron beam physical vapor deposition
Thermal barrier coatings
ZrO

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10.1016/j.surfcoat.2007.09.047

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title = "Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition",

abstract = "Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer (DCL) systems, which were deposited by electron beam physical vapor deposition (EB-PVD), were found to have a longer lifetime compared to the single layer La2Ce2O7 (LC) system, and even much longer than that of the single layer 8YSZ system under burner rig test. The DCL coating structure design can effectively alleviate the thermal expansion mismatch between LC coating and bond coat, as well as avoid the chemical reaction between LC and Al2O3 in thermally grown oxide (TGO), which occurs above 1000 °C as determined by differential scanning calorimetry (DSC) analysis. The failure mechanism of LC/8YSZ DCL coating is mainly due to the sintering of LC coating surface after long-term thermal cycling.",

keywords = "CeO, Electron beam physical vapor deposition, Thermal barrier coatings, ZrO",

author = "Wen Ma and Shengkai Gong and Hefei Li and Huibin Xu",

year = "2008",

month = mar,

day = "15",

doi = "10.1016/j.surfcoat.2007.09.047",

language = "英语",

volume = "202",

pages = "2704--2708",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition

AU - Ma, Wen

AU - Gong, Shengkai

AU - Li, Hefei

AU - Xu, Huibin

PY - 2008/3/15

Y1 - 2008/3/15

N2 - Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer (DCL) systems, which were deposited by electron beam physical vapor deposition (EB-PVD), were found to have a longer lifetime compared to the single layer La2Ce2O7 (LC) system, and even much longer than that of the single layer 8YSZ system under burner rig test. The DCL coating structure design can effectively alleviate the thermal expansion mismatch between LC coating and bond coat, as well as avoid the chemical reaction between LC and Al2O3 in thermally grown oxide (TGO), which occurs above 1000 °C as determined by differential scanning calorimetry (DSC) analysis. The failure mechanism of LC/8YSZ DCL coating is mainly due to the sintering of LC coating surface after long-term thermal cycling.

AB - Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer (DCL) systems, which were deposited by electron beam physical vapor deposition (EB-PVD), were found to have a longer lifetime compared to the single layer La2Ce2O7 (LC) system, and even much longer than that of the single layer 8YSZ system under burner rig test. The DCL coating structure design can effectively alleviate the thermal expansion mismatch between LC coating and bond coat, as well as avoid the chemical reaction between LC and Al2O3 in thermally grown oxide (TGO), which occurs above 1000 °C as determined by differential scanning calorimetry (DSC) analysis. The failure mechanism of LC/8YSZ DCL coating is mainly due to the sintering of LC coating surface after long-term thermal cycling.

KW - CeO

KW - Electron beam physical vapor deposition

KW - Thermal barrier coatings

KW - ZrO

UR - https://www.scopus.com/pages/publications/44349156066

U2 - 10.1016/j.surfcoat.2007.09.047

DO - 10.1016/j.surfcoat.2007.09.047

M3 - 文章

AN - SCOPUS:44349156066

SN - 0257-8972

VL - 202

SP - 2704

EP - 2708

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 12

ER -

Novel thermal barrier coatings based on La₂Ce₂O₇/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition

Abstract

Keywords

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