A study of fracture toughness and thermal property of nanostructured Yb2SiO5 environmental barrier coatings

Tao Zheng; Shun Wang; Baosheng Xu; Zelong Wang; Yiguang Wang

Journal of Materials Research and Technology (Sep 2023)

A study of fracture toughness and thermal property of nanostructured Yb2SiO5 environmental barrier coatings

Tao Zheng,
Shun Wang,
Baosheng Xu,
Zelong Wang,
Yiguang Wang

Affiliations

Tao Zheng: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China
Shun Wang: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China
Baosheng Xu: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China; Corresponding author. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China.
Zelong Wang: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China
Yiguang Wang: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China

Journal volume & issue: Vol. 26
pp. 4436 – 4443

Abstract

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The objective of this study was to examine the characteristics of a nanostructured Yb2SiO5 coating and a conventional Yb2SiO5 coating, both prepared using atmospheric plasma spraying (APS). The investigation focused on the phase composition, microstructure, thermal properties, and fracture toughness of the two types of Yb2SiO5 coatings. The findings revealed that both nanostructured and conventional coatings consisted of Yb2SiO5, Yb2O3, and amorphous phases. The nanostructured Yb2SiO5 coating exhibited lower residual tensile stress compared to the conventional Yb2SiO5 coating, resulting in fewer crack defects in the former. The thermal conductivity of the nanostructured Yb2SiO5 coating ranged from 0.71 to 1.22 W/(m·K) between 200 and 1200 °C, while the conventional Yb2SiO5 coating exhibited a thermal conductivity range of 0.81–1.32 W/(m·K) within the same temperature range. Consequently, the thermal conductivity of the nanostructured Yb2SiO5 coating was lower than that of the conventional counterpart. Furthermore, the presence of nanograins significantly enhanced the fracture toughness of the nanostructured Yb2SiO5 coating, which was found to be 1.7 times greater than that of the conventional Yb2SiO5 coating.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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