Mechanisms of La2Ce2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings against Volcanic Ash Corrosion-Reference-Cited by-同舟云学术

Mechanisms of La2Ce2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings against Volcanic Ash Corrosion

Published:2024-07-12 Issue:7 Volume:14 Page:877
ISSN:2079-6412
Container-title:Coatings
language:en
Short-container-title:Coatings

Author:

Xia Jie¹^ORCID,Du Xuelin¹,Xiao Yiqi²,Zhang Ling³,Wu Rudder Tse⁴,Matsushita Yoshitaka⁵^ORCID

Affiliation:

1. Department of Mechanical Engineering, Hunan Institute of Technology, Hengyang 421002, China

2. Department of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China

3. International Joint Laboratory for Light Alloys (MOE), College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

4. High Temperature Materials Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0044, Ibaraki, Japan

5. Chemical Analysis and X-ray Diffraction Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0044, Ibaraki, Japan

Abstract

To tackle the ever-increasing operating temperature of aero-engines, a La2Ce2O7 (LCO)/yttria partially stabilized zirconia (YSZ) double-layer thermal barrier coating (TBC) was investigated. The LCO/YSZ double-layer samples were annealed with volcanic ash (VA) at 1250 °C to assess their stability in comparison with that of standard single-layer YSZ. The findings showed that the double-layer system exhibited greater resistance to VA damage than the single-layer YSZ coating. The corrosion mechanism was characterized by a rapid crystallization reaction between LCO and VA, where the kinetics of the solution’s reprecipitation reaction outpaced the penetration rate into the coating’s open pores.

Funder

Scientific Research Fund of Hunan Provincial Education Department

Hunan Provincial Natural Science Foundation of China

Publisher

MDPI AG

Link

https://www.mdpi.com/2079-6412/14/7/877/pdf

Reference46 articles.

1. The Hotter the Engine, the Better;Perepezko;Science,2009

2. Advanced structural ceramics in aerospace propulsion;Padture;Nat. Mater.,2016

3. Environmental degradation of thermal-barrier coatings by molten deposits;Levi;MRS Bull.,2012

4. Recent development in advance ceramic materials and understanding the mechanisms of thermal barrier coatings degradation;Iqbal;Arch. Comput. Methods Eng.,2023

5. The thermal behavior of CMAS-infiltrated thermal barrier coatings;Kakuda;Surf. Coat. Technol.,2015