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

Authors :
Zhou, Feifei
Guo, Donghui
Zhang, Xiaofeng
Xu, Baosheng
Wang, Yiguang
Liu, Min
Wang, You
Source :
Ceramics International. Oct2022, Vol. 48 Issue 20, p31054-31059. 6p.
Publication Year :
2022

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-ZrO 2 /La 2 (Zr 0.75 Ce 0.25) 2 O 7 (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-ZrO 2 /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 ZrO 2 nanoparticles are included in the nanostructured zone. The phase structure of coatings consists of fluorite LCZ and tetragonal ZrO 2 (t-ZrO 2). The presence of ZrO 2 nanoparticles is derived from the decomposition of LCZ feedstocks during plasma spraying. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728842
Volume :
48
Issue :
20
Database :
Academic Search Index
Journal :
Ceramics International
Publication Type :
Academic Journal
Accession number :
158674296
Full Text :
https://doi.org/10.1016/j.ceramint.2022.06.246