Microstructure and phase evolution of Yb2SiO5/MoSi2-Mullite environmental barrier coatings on niobium alloy at 1500 °C

Kaifei Fan; Lingxiang Guo; Hongkang Ou; Hejun Li; Jia Sun

doi:10.1016/j.corsci.2023.111371

Microstructure and phase evolution of Yb₂SiO₅/MoSi₂-Mullite environmental barrier coatings on niobium alloy at 1500 °C

Kaifei Fan, Lingxiang Guo, Hongkang Ou, Hejun Li, Jia Sun

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Water-vapor corrosion behavior of Yb₂SiO₅/MoSi₂-Mullite double-layer environmental barrier coating on Nb based alloy at 1500 °C was investigated systematically. Initially, the thermal grown oxide (TGO, mainly SiO₂) appearing undulating morphology was generated at the interface of Yb₂SiO₅/MoSi₂-Mullite. Then, undulation characteristics of TGO layer were gradually weakened, and the maximum tensile stress near TGO layer reduced by ∼36%. With the internal diffusion of Yb₂O₃ and the generation of gaseous water-vapor corrosion substance, pores in the Yb₂SiO₅ layer, acting as diffusion paths for oxygen, induced continual thickening of TGO with an approximately line law, resulting in horizontal cracking near the TGO layer.

Original language	English
Article number	111371
Journal	Corrosion Science
Volume	221
DOIs	https://doi.org/10.1016/j.corsci.2023.111371
State	Published - 15 Aug 2023

Keywords

Microstructure and phase evolution
MoSi
Nb alloy
Water-vapor corrosion
YbSiO

Access to Document

10.1016/j.corsci.2023.111371

Cite this

@article{22ca8ea401a64d2cac68d3718b12ce8a,

title = "Microstructure and phase evolution of Yb2SiO5/MoSi2-Mullite environmental barrier coatings on niobium alloy at 1500 °C",

abstract = "Water-vapor corrosion behavior of Yb2SiO5/MoSi2-Mullite double-layer environmental barrier coating on Nb based alloy at 1500 °C was investigated systematically. Initially, the thermal grown oxide (TGO, mainly SiO2) appearing undulating morphology was generated at the interface of Yb2SiO5/MoSi2-Mullite. Then, undulation characteristics of TGO layer were gradually weakened, and the maximum tensile stress near TGO layer reduced by ∼36%. With the internal diffusion of Yb2O3 and the generation of gaseous water-vapor corrosion substance, pores in the Yb2SiO5 layer, acting as diffusion paths for oxygen, induced continual thickening of TGO with an approximately line law, resulting in horizontal cracking near the TGO layer.",

keywords = "Microstructure and phase evolution, MoSi, Nb alloy, Water-vapor corrosion, YbSiO",

author = "Kaifei Fan and Lingxiang Guo and Hongkang Ou and Hejun Li and Jia Sun",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = aug,

day = "15",

doi = "10.1016/j.corsci.2023.111371",

language = "英语",

volume = "221",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Microstructure and phase evolution of Yb2SiO5/MoSi2-Mullite environmental barrier coatings on niobium alloy at 1500 °C

AU - Fan, Kaifei

AU - Guo, Lingxiang

AU - Ou, Hongkang

AU - Li, Hejun

AU - Sun, Jia

PY - 2023/8/15

Y1 - 2023/8/15

N2 - Water-vapor corrosion behavior of Yb2SiO5/MoSi2-Mullite double-layer environmental barrier coating on Nb based alloy at 1500 °C was investigated systematically. Initially, the thermal grown oxide (TGO, mainly SiO2) appearing undulating morphology was generated at the interface of Yb2SiO5/MoSi2-Mullite. Then, undulation characteristics of TGO layer were gradually weakened, and the maximum tensile stress near TGO layer reduced by ∼36%. With the internal diffusion of Yb2O3 and the generation of gaseous water-vapor corrosion substance, pores in the Yb2SiO5 layer, acting as diffusion paths for oxygen, induced continual thickening of TGO with an approximately line law, resulting in horizontal cracking near the TGO layer.

AB - Water-vapor corrosion behavior of Yb2SiO5/MoSi2-Mullite double-layer environmental barrier coating on Nb based alloy at 1500 °C was investigated systematically. Initially, the thermal grown oxide (TGO, mainly SiO2) appearing undulating morphology was generated at the interface of Yb2SiO5/MoSi2-Mullite. Then, undulation characteristics of TGO layer were gradually weakened, and the maximum tensile stress near TGO layer reduced by ∼36%. With the internal diffusion of Yb2O3 and the generation of gaseous water-vapor corrosion substance, pores in the Yb2SiO5 layer, acting as diffusion paths for oxygen, induced continual thickening of TGO with an approximately line law, resulting in horizontal cracking near the TGO layer.

KW - Microstructure and phase evolution

KW - MoSi

KW - Nb alloy

KW - Water-vapor corrosion

KW - YbSiO

UR - http://www.scopus.com/inward/record.url?scp=85164274924&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2023.111371

DO - 10.1016/j.corsci.2023.111371

M3 - 文章

AN - SCOPUS:85164274924

SN - 0010-938X

VL - 221

JO - Corrosion Science

JF - Corrosion Science

M1 - 111371

ER -

Microstructure and phase evolution of Yb₂SiO₅/MoSi₂-Mullite environmental barrier coatings on niobium alloy at 1500 °C

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this