Hot Corrosion Behavior of Yttria-Stabilized Zirconia in the Presence of CMAS and CMAS + NaVO3 Mixture
Source abstract
Abstract
The aim of this paper is to study the corrosion mechanism of CaO-MgO-Al2O3-SiO2 (CMAS) powder and CMAS + NaVO3 (hereafter referred to as CN) mixed powder on a yttria-stabilized zirconia (YSZ) block at different temperatures. In this paper, the CMAS and CN corrosion behavior of YSZ at 1200 °C and 1250 °C was studied. The results show that at 1200 °C, CMAS cannot completely melt, causing limited damage to YSZ. However, CN melts completely at this temperature, partially penetrating the YSZ interior and causing surface corrosion. At 1250 °C, both CMAS and CN melt completely. CMAS, characterized by high viscosity and shallow penetration, seriously damaged the YSZ surface layer. In contrast, CN, with its lower viscosity and enhanced penetration capability, induces internal corrosion of YSZ. Through the analysis of the corrosion mechanisms of CMAS and CN, it is concluded that CN poses a more significant threat to the integrity of thermal barrier coatings (TBCs).
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear materials and radiation effects · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Tianmushan Laboratory, Hangzhou 311115, China
Research Institute of Aero-Engine, Beihang University, Beijing 100191, China
AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China
School of Materials Science and Engineering, Beihang University, Beijing 100191, China
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
Funding
Key R&D Program of Zhejiang · Zhejiang Provincial Natural Science Foundation of China · National Major Science and Technology Programs
References (27)
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