Effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of B-Y modified silicide coating

Yanxiang Liu; Wan Wang; Zongjie Liu; Chungen Zhou

doi:10.1016/j.pnsc.2016.01.003

Effect of Y₂O₃ content in the pack mixtures on microstructure and oxidation resistance of B-Y modified silicide coating

Yanxiang Liu
, Wan Wang
, Zongjie Liu
, Chungen Zhou^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

13 Scopus citations

Abstract

B-Y modified silicide coatings were prepared on Nb-Si based alloy by pack cementation at 1300 °C for 10 h. The effect of Y₂O₃ content in the pack mixtures on microstructure and oxidation resistance of the coatings was investigated. The results show that the four coatings have similar structures, which possess a (Nb,X)Si₂ outer layer and a (Nb,X)₅Si₃ transitional layer. Y₂O₃ content in the pack mixtures has an obvious effect on the Si content in the coating. The mass gains of the coatings prepared with 0.5, 1, 2 and 3 wt% Y₂O₃ in pack mixtures are 2.33, 1.96, 2.05 and 2.86 mg/cm² after oxidation at 1250 °C for 100 h, respectively. The coating prepared with 1 wt% Y₂O₃ exhibits the best oxidation resistance due to the formation of a dense glass-like borosilicate scale.

Original language	English
Pages (from-to)	49-57
Number of pages	9
Journal	Progress in Natural Science: Materials International
Volume	26
Issue number	1
DOIs	https://doi.org/10.1016/j.pnsc.2016.01.003
State	Published - 1 Feb 2016

Keywords

Coating
High-temperature alloys
Intermetallics
Oxidation

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10.1016/j.pnsc.2016.01.003

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title = "Effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of B-Y modified silicide coating",

abstract = "B-Y modified silicide coatings were prepared on Nb-Si based alloy by pack cementation at 1300 °C for 10 h. The effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of the coatings was investigated. The results show that the four coatings have similar structures, which possess a (Nb,X)Si2 outer layer and a (Nb,X)5Si3 transitional layer. Y2O3 content in the pack mixtures has an obvious effect on the Si content in the coating. The mass gains of the coatings prepared with 0.5, 1, 2 and 3 wt\% Y2O3 in pack mixtures are 2.33, 1.96, 2.05 and 2.86 mg/cm2 after oxidation at 1250 °C for 100 h, respectively. The coating prepared with 1 wt\% Y2O3 exhibits the best oxidation resistance due to the formation of a dense glass-like borosilicate scale.",

keywords = "Coating, High-temperature alloys, Intermetallics, Oxidation",

author = "Yanxiang Liu and Wan Wang and Zongjie Liu and Chungen Zhou",

note = "Publisher Copyright: {\textcopyright} 2016 The Authors.",

year = "2016",

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day = "1",

doi = "10.1016/j.pnsc.2016.01.003",

language = "英语",

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pages = "49--57",

journal = "Progress in Natural Science: Materials International",

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T1 - Effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of B-Y modified silicide coating

AU - Liu, Yanxiang

AU - Wang, Wan

AU - Liu, Zongjie

AU - Zhou, Chungen

PY - 2016/2/1

Y1 - 2016/2/1

N2 - B-Y modified silicide coatings were prepared on Nb-Si based alloy by pack cementation at 1300 °C for 10 h. The effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of the coatings was investigated. The results show that the four coatings have similar structures, which possess a (Nb,X)Si2 outer layer and a (Nb,X)5Si3 transitional layer. Y2O3 content in the pack mixtures has an obvious effect on the Si content in the coating. The mass gains of the coatings prepared with 0.5, 1, 2 and 3 wt% Y2O3 in pack mixtures are 2.33, 1.96, 2.05 and 2.86 mg/cm2 after oxidation at 1250 °C for 100 h, respectively. The coating prepared with 1 wt% Y2O3 exhibits the best oxidation resistance due to the formation of a dense glass-like borosilicate scale.

AB - B-Y modified silicide coatings were prepared on Nb-Si based alloy by pack cementation at 1300 °C for 10 h. The effect of Y2O3 content in the pack mixtures on microstructure and oxidation resistance of the coatings was investigated. The results show that the four coatings have similar structures, which possess a (Nb,X)Si2 outer layer and a (Nb,X)5Si3 transitional layer. Y2O3 content in the pack mixtures has an obvious effect on the Si content in the coating. The mass gains of the coatings prepared with 0.5, 1, 2 and 3 wt% Y2O3 in pack mixtures are 2.33, 1.96, 2.05 and 2.86 mg/cm2 after oxidation at 1250 °C for 100 h, respectively. The coating prepared with 1 wt% Y2O3 exhibits the best oxidation resistance due to the formation of a dense glass-like borosilicate scale.

KW - Coating

KW - High-temperature alloys

KW - Intermetallics

KW - Oxidation

UR - https://www.scopus.com/pages/publications/84960423779

U2 - 10.1016/j.pnsc.2016.01.003

DO - 10.1016/j.pnsc.2016.01.003

M3 - 文章

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SN - 1002-0071

VL - 26

SP - 49

EP - 57

JO - Progress in Natural Science: Materials International

JF - Progress in Natural Science: Materials International

IS - 1

ER -

Effect of Y₂O₃ content in the pack mixtures on microstructure and oxidation resistance of B-Y modified silicide coating

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Keywords

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