A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

Jia Sun; Qian Gang Fu; Tao Li; Chen Wang; Cai Xia Huo; Hong Zhou; Guan Jun Yang; Le Sun

doi:10.1016/j.apsusc.2018.01.114

A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

Jia Sun, Qian Gang Fu, Tao Li, Chen Wang, Cai Xia Huo, Hong Zhou, Guan Jun Yang, Le Sun

School of Materials Sience and Engineering

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

27 Scopus citations

Abstract

Nb-based alloy possessed limited application service life at ultrahigh temperature (>1400 °C) in air even taking the effective protective coating strategy into consideration for last decades. In this work a long duration of above 128 h at 1500 °C in air was successfully achieved on Nb-based alloy thanked to multi-layered silicide coating. Through optimizing interfaces, the MoSi ₂ /NbSi ₂ silicide coating with Al ₂ O ₃ -adsorbed-particles layer exhibited three-times higher of oxidation resistance capacity than the one without it. In MoSi ₂ -Al ₂ O ₃ -NbSi ₂ multilayer coating, the Al ₂ O ₃ -adsorbed-particles layer playing as an element-diffusion barrier role, as well as the formed porous Nb ₅ Si ₃ layer as a stress transition zone, contributed to the significant improvement.

Original language	English
Pages (from-to)	1111-1118
Number of pages	8
Journal	Applied Surface Science
Volume	439
DOIs	https://doi.org/10.1016/j.apsusc.2018.01.114
State	Published - 1 May 2018

Keywords

Coatings
Diffusion
Molybdenum silicide
Oxidation resistance

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10.1016/j.apsusc.2018.01.114

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title = "A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air",

abstract = " Nb-based alloy possessed limited application service life at ultrahigh temperature (>1400 °C) in air even taking the effective protective coating strategy into consideration for last decades. In this work a long duration of above 128 h at 1500 °C in air was successfully achieved on Nb-based alloy thanked to multi-layered silicide coating. Through optimizing interfaces, the MoSi 2 /NbSi 2 silicide coating with Al 2 O 3 -adsorbed-particles layer exhibited three-times higher of oxidation resistance capacity than the one without it. In MoSi 2 -Al 2 O 3 -NbSi 2 multilayer coating, the Al 2 O 3 -adsorbed-particles layer playing as an element-diffusion barrier role, as well as the formed porous Nb 5 Si 3 layer as a stress transition zone, contributed to the significant improvement.",

keywords = "Coatings, Diffusion, Molybdenum silicide, Oxidation resistance",

author = "Jia Sun and Fu, {Qian Gang} and Tao Li and Chen Wang and Huo, {Cai Xia} and Hong Zhou and Yang, {Guan Jun} and Le Sun",

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doi = "10.1016/j.apsusc.2018.01.114",

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T1 - A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

AU - Sun, Jia

AU - Fu, Qian Gang

AU - Li, Tao

AU - Wang, Chen

AU - Huo, Cai Xia

AU - Zhou, Hong

AU - Yang, Guan Jun

AU - Sun, Le

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Nb-based alloy possessed limited application service life at ultrahigh temperature (>1400 °C) in air even taking the effective protective coating strategy into consideration for last decades. In this work a long duration of above 128 h at 1500 °C in air was successfully achieved on Nb-based alloy thanked to multi-layered silicide coating. Through optimizing interfaces, the MoSi 2 /NbSi 2 silicide coating with Al 2 O 3 -adsorbed-particles layer exhibited three-times higher of oxidation resistance capacity than the one without it. In MoSi 2 -Al 2 O 3 -NbSi 2 multilayer coating, the Al 2 O 3 -adsorbed-particles layer playing as an element-diffusion barrier role, as well as the formed porous Nb 5 Si 3 layer as a stress transition zone, contributed to the significant improvement.

AB - Nb-based alloy possessed limited application service life at ultrahigh temperature (>1400 °C) in air even taking the effective protective coating strategy into consideration for last decades. In this work a long duration of above 128 h at 1500 °C in air was successfully achieved on Nb-based alloy thanked to multi-layered silicide coating. Through optimizing interfaces, the MoSi 2 /NbSi 2 silicide coating with Al 2 O 3 -adsorbed-particles layer exhibited three-times higher of oxidation resistance capacity than the one without it. In MoSi 2 -Al 2 O 3 -NbSi 2 multilayer coating, the Al 2 O 3 -adsorbed-particles layer playing as an element-diffusion barrier role, as well as the formed porous Nb 5 Si 3 layer as a stress transition zone, contributed to the significant improvement.

KW - Coatings

KW - Diffusion

KW - Molybdenum silicide

KW - Oxidation resistance

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M3 - 文章

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VL - 439

SP - 1111

EP - 1118

JO - Applied Surface Science

JF - Applied Surface Science

ER -

A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

Abstract

Keywords

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