Microstructural evolution and interdiffusion behavior of Mo-Si-B coating on Nb-Si based alloy

Jinliang Pi; Wei Shao; Chungen Zhou

doi:10.1016/j.intermet.2018.02.003

Microstructural evolution and interdiffusion behavior of Mo-Si-B coating on Nb-Si based alloy

Jinliang Pi
, Wei Shao
, Chungen Zhou^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

20 Scopus citations

Abstract

A Mo-Si-B coating was prepared on an Nb-Si based alloy by detonation-gun spraying of Mo followed by co-deposition of Si and B via pack cementation. The microstructural evolution and interdiffusion behavior of the coating/substrate system were investigated by annealing for different times at 1250 °C in argon atmosphere. The results show that the interdiffusion zone has a two-layer structure consisting of (Mo, X^′)₅Si₃ (X^’ = Nb, Ti, Cr, Hf) and (Nb, X)₅Si₃ (X = Ti, Cr, Hf), respectively. The growth of the transitional layer, which obeys a parabolic rate law, is dominated by the inward diffusion of Si from the outer layer to the substrate. The interdiffusion coefficients of Si in the transitional layers are calculated using a modified method based on the Boltzmann-Matano analysis.

Original language	English
Pages (from-to)	150-156
Number of pages	7
Journal	Intermetallics
Volume	95
DOIs	https://doi.org/10.1016/j.intermet.2018.02.003
State	Published - Apr 2018

Keywords

A. Silicides
B. Diffusion
C. Coatings
D. Microstructure

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10.1016/j.intermet.2018.02.003

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@article{b3d9d32a5ed4434ea0f66cdc72ab5256,

title = "Microstructural evolution and interdiffusion behavior of Mo-Si-B coating on Nb-Si based alloy",

abstract = "A Mo-Si-B coating was prepared on an Nb-Si based alloy by detonation-gun spraying of Mo followed by co-deposition of Si and B via pack cementation. The microstructural evolution and interdiffusion behavior of the coating/substrate system were investigated by annealing for different times at 1250 °C in argon atmosphere. The results show that the interdiffusion zone has a two-layer structure consisting of (Mo, X′)5Si3 (X{\textquoteright} = Nb, Ti, Cr, Hf) and (Nb, X)5Si3 (X = Ti, Cr, Hf), respectively. The growth of the transitional layer, which obeys a parabolic rate law, is dominated by the inward diffusion of Si from the outer layer to the substrate. The interdiffusion coefficients of Si in the transitional layers are calculated using a modified method based on the Boltzmann-Matano analysis.",

keywords = "A. Silicides, B. Diffusion, C. Coatings, D. Microstructure",

author = "Jinliang Pi and Wei Shao and Chungen Zhou",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = apr,

doi = "10.1016/j.intermet.2018.02.003",

language = "英语",

volume = "95",

pages = "150--156",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Microstructural evolution and interdiffusion behavior of Mo-Si-B coating on Nb-Si based alloy

AU - Pi, Jinliang

AU - Shao, Wei

AU - Zhou, Chungen

PY - 2018/4

Y1 - 2018/4

N2 - A Mo-Si-B coating was prepared on an Nb-Si based alloy by detonation-gun spraying of Mo followed by co-deposition of Si and B via pack cementation. The microstructural evolution and interdiffusion behavior of the coating/substrate system were investigated by annealing for different times at 1250 °C in argon atmosphere. The results show that the interdiffusion zone has a two-layer structure consisting of (Mo, X′)5Si3 (X’ = Nb, Ti, Cr, Hf) and (Nb, X)5Si3 (X = Ti, Cr, Hf), respectively. The growth of the transitional layer, which obeys a parabolic rate law, is dominated by the inward diffusion of Si from the outer layer to the substrate. The interdiffusion coefficients of Si in the transitional layers are calculated using a modified method based on the Boltzmann-Matano analysis.

AB - A Mo-Si-B coating was prepared on an Nb-Si based alloy by detonation-gun spraying of Mo followed by co-deposition of Si and B via pack cementation. The microstructural evolution and interdiffusion behavior of the coating/substrate system were investigated by annealing for different times at 1250 °C in argon atmosphere. The results show that the interdiffusion zone has a two-layer structure consisting of (Mo, X′)5Si3 (X’ = Nb, Ti, Cr, Hf) and (Nb, X)5Si3 (X = Ti, Cr, Hf), respectively. The growth of the transitional layer, which obeys a parabolic rate law, is dominated by the inward diffusion of Si from the outer layer to the substrate. The interdiffusion coefficients of Si in the transitional layers are calculated using a modified method based on the Boltzmann-Matano analysis.

KW - A. Silicides

KW - B. Diffusion

KW - C. Coatings

KW - D. Microstructure

UR - https://www.scopus.com/pages/publications/85042673380

U2 - 10.1016/j.intermet.2018.02.003

DO - 10.1016/j.intermet.2018.02.003

M3 - 文章

AN - SCOPUS:85042673380

SN - 0966-9795

VL - 95

SP - 150

EP - 156

JO - Intermetallics

JF - Intermetallics

ER -

Microstructural evolution and interdiffusion behavior of Mo-Si-B coating on Nb-Si based alloy

Abstract

Keywords

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