Growth behavior and barrier mechanism of corrosion product layer from calcium-magnesium-aluminosilicate on Yb2Si2O7-Yb2SiO5 composite environmental barrier coatings at 1300 ℃

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-06-18 DOI:10.1016/j.corsci.2025.113112

Shuang Yu , Shuqi Wang , Yaming Wang , Zhiyun Ye , Qiang Zhao , Yang Li , Dawei Ren , Guoliang Chen , Yongchun Zou , Jiahu Ouyang , Dechang Jia , Yu Zhou

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引用次数: 0

Abstract

The corrosion mechanism of Yb₂Si₂O₇-Yb₂SiO₅ composite environmental barrier coatings (EBCs) with various mass ratios under calcium-magnesium-aluminosilicate (CMAS) attack at 1300 ℃ for 100 h was investigated. The predominant products of the 75Yb₂Si₂O₇-25Yb₂SiO₅ (with a dense layer thickness of 15.83 ± 1.79 μm) and 50Yb₂Si₂O₇-50Yb₂SiO₅ (with a dense layer thickness of 11.61 ± 1.19 μm) EBCs are apatites with dense bottom structures. In addition to apatite, a garnet layer is produced on the 25Yb₂Si₂O₇-75Yb₂SiO₅ EBC surface due to the high Al:Si ratio in the CMAS melt. The dense corrosion product layer (∼35.37 ± 4.75 μm) on the 25Yb₂Si₂O₇-75Yb₂SiO₅ EBC obviously hindered the infiltration of the CMAS melt, showing superior CMAS corrosion resistance.

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1300℃时钙镁铝硅酸盐在Yb2Si2O7-Yb2SiO5复合环境屏障涂层上的腐蚀产物层生长行为及屏障机理

研究了不同质量比的Yb2Si2O7-Yb2SiO5复合环境屏障涂层（EBCs）在1300℃、100 h的钙镁铝硅酸盐（CMAS）腐蚀下的腐蚀机理。75Yb2Si2O7-25Yb2SiO5（致密层厚度为15.83 ± 1.79 μm）和50Yb2Si2O7-50Yb2SiO5（致密层厚度为11.61 ± 1.19 μm） EBCs的主要产物是底部结构致密的磷灰石。除了磷灰石外，由于CMAS熔体中铝硅比高，25Yb2Si2O7-75Yb2SiO5 EBC表面还形成石榴石层。25Yb2Si2O7-75Yb2SiO5 EBC上致密的腐蚀产物层（~ 35.37 ± 4.75 μm）明显阻碍了CMAS熔体的渗透，表现出优异的CMAS耐蚀性。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.