In-situ synthesized nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 composite thermal barrier coatings

Feifei Zhou; Donghui Guo; Xiaofeng Zhang; Baosheng Xu; Yiguang Wang; Min Liu; You Wang

doi:10.1016/j.ceramint.2022.06.246

In-situ synthesized nanostructured t-ZrO₂/La₂(Zr_0.75Ce_0.25)₂O₇ composite thermal barrier coatings

Feifei Zhou^*, Donghui Guo, Xiaofeng Zhang, Baosheng Xu^*, Yiguang Wang, Min Liu, You Wang

^*Corresponding author for this work

Institute of Advanced Structure Technology

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

10 Citations (Scopus)

Abstract

As we all know, the poor toughness is an important factor that leads thermal barrier coatings to prematurely fail, which has been recognized as one of the urgent problems that need to be addressed. Herein, the nanostructured t-ZrO₂/La₂(Zr_0.75Ce_0.25)₂O₇ (LCZ) composite TBCs were constructed in-situ from plasma spraying. The microstructure and phase composition of nanostructured LCZ feedstocks and as-sprayed coatings were analysed. Moreover, the mechanism of in-situ synthesized nanostructured t-ZrO₂/LCZ coatings was discussed in detail. Results show that as-sprayed coatings have the characteristics of bi-modal and dual-phase structures. The unmelted nanostructured LCZ feedstocks and in-situ synthesized ZrO₂ nanoparticles are included in the nanostructured zone. The phase structure of coatings consists of fluorite LCZ and tetragonal ZrO₂ (t-ZrO₂). The presence of ZrO₂ nanoparticles is derived from the decomposition of LCZ feedstocks during plasma spraying.

Original language	English
Pages (from-to)	31054-31059
Number of pages	6
Journal	Ceramics International
Volume	48
Issue number	20
DOIs	https://doi.org/10.1016/j.ceramint.2022.06.246
Publication status	Published - 15 Oct 2022

Keywords

In-situ synthesis
La(ZrCe)O
Nanostructured thermal barrier coatings
Plasma spraying

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10.1016/j.ceramint.2022.06.246

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@article{0b8877e5684f4421bc65d3fbb2f0e77e,

title = "In-situ synthesized nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 composite thermal barrier coatings",

abstract = "As we all know, the poor toughness is an important factor that leads thermal barrier coatings to prematurely fail, which has been recognized as one of the urgent problems that need to be addressed. Herein, the nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 (LCZ) composite TBCs were constructed in-situ from plasma spraying. The microstructure and phase composition of nanostructured LCZ feedstocks and as-sprayed coatings were analysed. Moreover, the mechanism of in-situ synthesized nanostructured t-ZrO2/LCZ coatings was discussed in detail. Results show that as-sprayed coatings have the characteristics of bi-modal and dual-phase structures. The unmelted nanostructured LCZ feedstocks and in-situ synthesized ZrO2 nanoparticles are included in the nanostructured zone. The phase structure of coatings consists of fluorite LCZ and tetragonal ZrO2 (t-ZrO2). The presence of ZrO2 nanoparticles is derived from the decomposition of LCZ feedstocks during plasma spraying.",

keywords = "In-situ synthesis, La(ZrCe)O, Nanostructured thermal barrier coatings, Plasma spraying",

author = "Feifei Zhou and Donghui Guo and Xiaofeng Zhang and Baosheng Xu and Yiguang Wang and Min Liu and You Wang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",

year = "2022",

month = oct,

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doi = "10.1016/j.ceramint.2022.06.246",

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T1 - In-situ synthesized nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 composite thermal barrier coatings

AU - Zhou, Feifei

AU - Guo, Donghui

AU - Zhang, Xiaofeng

AU - Xu, Baosheng

AU - Wang, Yiguang

AU - Liu, Min

AU - Wang, You

PY - 2022/10/15

Y1 - 2022/10/15

N2 - As we all know, the poor toughness is an important factor that leads thermal barrier coatings to prematurely fail, which has been recognized as one of the urgent problems that need to be addressed. Herein, the nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 (LCZ) composite TBCs were constructed in-situ from plasma spraying. The microstructure and phase composition of nanostructured LCZ feedstocks and as-sprayed coatings were analysed. Moreover, the mechanism of in-situ synthesized nanostructured t-ZrO2/LCZ coatings was discussed in detail. Results show that as-sprayed coatings have the characteristics of bi-modal and dual-phase structures. The unmelted nanostructured LCZ feedstocks and in-situ synthesized ZrO2 nanoparticles are included in the nanostructured zone. The phase structure of coatings consists of fluorite LCZ and tetragonal ZrO2 (t-ZrO2). The presence of ZrO2 nanoparticles is derived from the decomposition of LCZ feedstocks during plasma spraying.

AB - As we all know, the poor toughness is an important factor that leads thermal barrier coatings to prematurely fail, which has been recognized as one of the urgent problems that need to be addressed. Herein, the nanostructured t-ZrO2/La2(Zr0.75Ce0.25)2O7 (LCZ) composite TBCs were constructed in-situ from plasma spraying. The microstructure and phase composition of nanostructured LCZ feedstocks and as-sprayed coatings were analysed. Moreover, the mechanism of in-situ synthesized nanostructured t-ZrO2/LCZ coatings was discussed in detail. Results show that as-sprayed coatings have the characteristics of bi-modal and dual-phase structures. The unmelted nanostructured LCZ feedstocks and in-situ synthesized ZrO2 nanoparticles are included in the nanostructured zone. The phase structure of coatings consists of fluorite LCZ and tetragonal ZrO2 (t-ZrO2). The presence of ZrO2 nanoparticles is derived from the decomposition of LCZ feedstocks during plasma spraying.

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KW - Nanostructured thermal barrier coatings

KW - Plasma spraying

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In-situ synthesized nanostructured t-ZrO₂/La₂(Zr_0.75Ce_0.25)₂O₇ composite thermal barrier coatings

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