A novel composite Si-Mo-Ti coating with Ti concentration gradient for Nb-Si based ultrahigh temperature alloy prepared by slurry sintering

Longfei Li; Xiping Guo; Yanqiang Qiao

doi:10.1016/j.corsci.2023.111632

A novel composite Si-Mo-Ti coating with Ti concentration gradient for Nb-Si based ultrahigh temperature alloy prepared by slurry sintering

Longfei Li
, Xiping Guo
, Yanqiang Qiao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

11 Scopus citations

Abstract

Composite Si-Mo-Ti coatings with Ti concentration gradient have been successfully prepared on Nb-Si based ultrahigh temperature alloy by slurry sintering. The gradient structure has a higher content of Ti and a lower content of Mo in the outermost layer, which can inhibit the formation of volatile MoO₃ and cracks in the coating and guarantee the rapid formation of a dense Si-O-Ti layer during oxidation. After oxidation at 1380 ℃ for 100 h in air, a continuous and compact (Ti,X)O₂ layer and a dense duplex Si-O-Ti/(Ti,X)O₂ layer formed, which dramatically reduces inward diffusion of O^2- and effectively improves the oxidation resistance.

Original language	English
Article number	111632
Journal	Corrosion Science
Volume	225
DOIs	https://doi.org/10.1016/j.corsci.2023.111632
State	Published - Dec 2023

Keywords

Gradient coating
Nb-Si based ultrahigh temperature alloy
Oxidation resistance
Slurry sintering

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10.1016/j.corsci.2023.111632

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title = "A novel composite Si-Mo-Ti coating with Ti concentration gradient for Nb-Si based ultrahigh temperature alloy prepared by slurry sintering",

abstract = "Composite Si-Mo-Ti coatings with Ti concentration gradient have been successfully prepared on Nb-Si based ultrahigh temperature alloy by slurry sintering. The gradient structure has a higher content of Ti and a lower content of Mo in the outermost layer, which can inhibit the formation of volatile MoO3 and cracks in the coating and guarantee the rapid formation of a dense Si-O-Ti layer during oxidation. After oxidation at 1380 ℃ for 100 h in air, a continuous and compact (Ti,X)O2 layer and a dense duplex Si-O-Ti/(Ti,X)O2 layer formed, which dramatically reduces inward diffusion of O2- and effectively improves the oxidation resistance.",

keywords = "Gradient coating, Nb-Si based ultrahigh temperature alloy, Oxidation resistance, Slurry sintering",

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

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = dec,

doi = "10.1016/j.corsci.2023.111632",

language = "英语",

volume = "225",

journal = "Corrosion Science",

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TY - JOUR

T1 - A novel composite Si-Mo-Ti coating with Ti concentration gradient for Nb-Si based ultrahigh temperature alloy prepared by slurry sintering

AU - Li, Longfei

AU - Guo, Xiping

AU - Qiao, Yanqiang

PY - 2023/12

Y1 - 2023/12

N2 - Composite Si-Mo-Ti coatings with Ti concentration gradient have been successfully prepared on Nb-Si based ultrahigh temperature alloy by slurry sintering. The gradient structure has a higher content of Ti and a lower content of Mo in the outermost layer, which can inhibit the formation of volatile MoO3 and cracks in the coating and guarantee the rapid formation of a dense Si-O-Ti layer during oxidation. After oxidation at 1380 ℃ for 100 h in air, a continuous and compact (Ti,X)O2 layer and a dense duplex Si-O-Ti/(Ti,X)O2 layer formed, which dramatically reduces inward diffusion of O2- and effectively improves the oxidation resistance.

AB - Composite Si-Mo-Ti coatings with Ti concentration gradient have been successfully prepared on Nb-Si based ultrahigh temperature alloy by slurry sintering. The gradient structure has a higher content of Ti and a lower content of Mo in the outermost layer, which can inhibit the formation of volatile MoO3 and cracks in the coating and guarantee the rapid formation of a dense Si-O-Ti layer during oxidation. After oxidation at 1380 ℃ for 100 h in air, a continuous and compact (Ti,X)O2 layer and a dense duplex Si-O-Ti/(Ti,X)O2 layer formed, which dramatically reduces inward diffusion of O2- and effectively improves the oxidation resistance.

KW - Gradient coating

KW - Nb-Si based ultrahigh temperature alloy

KW - Oxidation resistance

KW - Slurry sintering

UR - https://www.scopus.com/pages/publications/85175249211

U2 - 10.1016/j.corsci.2023.111632

DO - 10.1016/j.corsci.2023.111632

M3 - 文章

AN - SCOPUS:85175249211

SN - 0010-938X

VL - 225

JO - Corrosion Science

JF - Corrosion Science

M1 - 111632

ER -

A novel composite Si-Mo-Ti coating with Ti concentration gradient for Nb-Si based ultrahigh temperature alloy prepared by slurry sintering

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Keywords

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