Study on the diffusion barrier effect of WSi2 layer at the MoSi2/Nb-Ti-Si based alloy interface

Gao Yue; Xiping Guo; Yanqiang Qiao

doi:10.1016/j.corsci.2019.108299

Study on the diffusion barrier effect of WSi₂ layer at the MoSi₂/Nb-Ti-Si based alloy interface

Gao Yue
, Xiping Guo
, Yanqiang Qiao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

37 Scopus citations

Abstract

WSi₂ layer was introduced at MoSi₂/Nb-Ti-Si based alloy interface to suppress the elemental diffusion. During coating formation process, inward diffusion of [Si] could be retarded and the growth rate of inner NbSi₂ layer was slowed down consequently. At 1250 °C, the MoSi₂/WSi₂ compound coating showed superior oxidation resistance relative to MoSi₂/NbSi₂ compound coating in terms of thinner scale and less MoSi₂ consumption. Parabolic rate constants of scales grew on these two coatings are 0.929 μm² h⁻¹ and 4.782 μm² h^-1, respectively. The improvement was resulted from the WSi₂ layer, which acted as both a diffusion barrier and Si reservoir simultaneously.

Original language	English
Article number	108299
Journal	Corrosion Science
Volume	163
DOIs	https://doi.org/10.1016/j.corsci.2019.108299
State	Published - Feb 2020

Keywords

A. Intermetallics
B. SEM
C. High temperature corrosion
C. Oxidation

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10.1016/j.corsci.2019.108299

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title = "Study on the diffusion barrier effect of WSi2 layer at the MoSi2/Nb-Ti-Si based alloy interface",

abstract = "WSi2 layer was introduced at MoSi2/Nb-Ti-Si based alloy interface to suppress the elemental diffusion. During coating formation process, inward diffusion of [Si] could be retarded and the growth rate of inner NbSi2 layer was slowed down consequently. At 1250 °C, the MoSi2/WSi2 compound coating showed superior oxidation resistance relative to MoSi2/NbSi2 compound coating in terms of thinner scale and less MoSi2 consumption. Parabolic rate constants of scales grew on these two coatings are 0.929 μm2 h−1 and 4.782 μm2 h-1, respectively. The improvement was resulted from the WSi2 layer, which acted as both a diffusion barrier and Si reservoir simultaneously.",

keywords = "A. Intermetallics, B. SEM, C. High temperature corrosion, C. Oxidation",

author = "Gao Yue and Xiping Guo and Yanqiang Qiao",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = feb,

doi = "10.1016/j.corsci.2019.108299",

language = "英语",

volume = "163",

journal = "Corrosion Science",

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TY - JOUR

T1 - Study on the diffusion barrier effect of WSi2 layer at the MoSi2/Nb-Ti-Si based alloy interface

AU - Yue, Gao

AU - Guo, Xiping

AU - Qiao, Yanqiang

PY - 2020/2

Y1 - 2020/2

N2 - WSi2 layer was introduced at MoSi2/Nb-Ti-Si based alloy interface to suppress the elemental diffusion. During coating formation process, inward diffusion of [Si] could be retarded and the growth rate of inner NbSi2 layer was slowed down consequently. At 1250 °C, the MoSi2/WSi2 compound coating showed superior oxidation resistance relative to MoSi2/NbSi2 compound coating in terms of thinner scale and less MoSi2 consumption. Parabolic rate constants of scales grew on these two coatings are 0.929 μm2 h−1 and 4.782 μm2 h-1, respectively. The improvement was resulted from the WSi2 layer, which acted as both a diffusion barrier and Si reservoir simultaneously.

AB - WSi2 layer was introduced at MoSi2/Nb-Ti-Si based alloy interface to suppress the elemental diffusion. During coating formation process, inward diffusion of [Si] could be retarded and the growth rate of inner NbSi2 layer was slowed down consequently. At 1250 °C, the MoSi2/WSi2 compound coating showed superior oxidation resistance relative to MoSi2/NbSi2 compound coating in terms of thinner scale and less MoSi2 consumption. Parabolic rate constants of scales grew on these two coatings are 0.929 μm2 h−1 and 4.782 μm2 h-1, respectively. The improvement was resulted from the WSi2 layer, which acted as both a diffusion barrier and Si reservoir simultaneously.

KW - A. Intermetallics

KW - B. SEM

KW - C. High temperature corrosion

KW - C. Oxidation

UR - https://www.scopus.com/pages/publications/85076568041

U2 - 10.1016/j.corsci.2019.108299

DO - 10.1016/j.corsci.2019.108299

M3 - 文章

AN - SCOPUS:85076568041

SN - 0010-938X

VL - 163

JO - Corrosion Science

JF - Corrosion Science

M1 - 108299

ER -

Study on the diffusion barrier effect of WSi₂ layer at the MoSi₂/Nb-Ti-Si based alloy interface

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Keywords

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