Hot corrosion behavior of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy

Yanqiang Qiao; Xiping Guo; Xuan Li

doi:10.1016/j.corsci.2014.10.053

Hot corrosion behavior of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy

Yanqiang Qiao, Xiping Guo, Xuan Li

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

51 引用（Scopus）

摘要

Hot corrosion behavior of an Nb-Ti-Si alloy and its silicide coating in Na₂SO₄-25wt.% NaCl molten salts at 900°C was investigated. For the bare alloy, a thick and porous corroded scale (Na-containing oxides) was formed after hot corrosion. The silicide coating showed a good oxidation resistance at 900°C, while the presence of the molten salts aggravated the damage process of the silicide coating by forming a thick corroded scale which mainly consisted of a Na₂TiSi₂O₇ outer layer and a porous and cracked NaNbO₃+Na₂TiSi₂O₇ inner layer. The possible hot corrosion mechanism of the silicide coating has been explored.

源语言	英语
页（从-至）	75-85
页数	11
期刊	Corrosion Science
卷	91
DOI	https://doi.org/10.1016/j.corsci.2014.10.053
出版状态	已出版 - 1 2月 2015

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title = "Hot corrosion behavior of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy",

abstract = "Hot corrosion behavior of an Nb-Ti-Si alloy and its silicide coating in Na2SO4-25wt.% NaCl molten salts at 900°C was investigated. For the bare alloy, a thick and porous corroded scale (Na-containing oxides) was formed after hot corrosion. The silicide coating showed a good oxidation resistance at 900°C, while the presence of the molten salts aggravated the damage process of the silicide coating by forming a thick corroded scale which mainly consisted of a Na2TiSi2O7 outer layer and a porous and cracked NaNbO3+Na2TiSi2O7 inner layer. The possible hot corrosion mechanism of the silicide coating has been explored.",

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author = "Yanqiang Qiao and Xiping Guo and Xuan Li",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd.",

year = "2015",

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AU - Qiao, Yanqiang

AU - Guo, Xiping

AU - Li, Xuan

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N2 - Hot corrosion behavior of an Nb-Ti-Si alloy and its silicide coating in Na2SO4-25wt.% NaCl molten salts at 900°C was investigated. For the bare alloy, a thick and porous corroded scale (Na-containing oxides) was formed after hot corrosion. The silicide coating showed a good oxidation resistance at 900°C, while the presence of the molten salts aggravated the damage process of the silicide coating by forming a thick corroded scale which mainly consisted of a Na2TiSi2O7 outer layer and a porous and cracked NaNbO3+Na2TiSi2O7 inner layer. The possible hot corrosion mechanism of the silicide coating has been explored.

AB - Hot corrosion behavior of an Nb-Ti-Si alloy and its silicide coating in Na2SO4-25wt.% NaCl molten salts at 900°C was investigated. For the bare alloy, a thick and porous corroded scale (Na-containing oxides) was formed after hot corrosion. The silicide coating showed a good oxidation resistance at 900°C, while the presence of the molten salts aggravated the damage process of the silicide coating by forming a thick corroded scale which mainly consisted of a Na2TiSi2O7 outer layer and a porous and cracked NaNbO3+Na2TiSi2O7 inner layer. The possible hot corrosion mechanism of the silicide coating has been explored.

KW - A. Intermetallic

KW - A. Metal coatings

KW - C. Hot corrosion

KW - C. Oxidation

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DO - 10.1016/j.corsci.2014.10.053

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SN - 0010-938X

VL - 91

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JO - Corrosion Science

JF - Corrosion Science

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Hot corrosion behavior of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy

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