Film-forming investigation of NbC-modified HfC coating based on oxyacetylene ablation and argon-atmosphere heating above 2000 °C

Ruixiang He; Kezhi Li; Wenhao Zhang; Longqi Liu

doi:10.1016/j.corsci.2023.111303

Film-forming investigation of NbC-modified HfC coating based on oxyacetylene ablation and argon-atmosphere heating above 2000 °C

Ruixiang He, Kezhi Li, Wenhao Zhang, Longqi Liu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

5 Scopus citations

Abstract

Ablation test of NbC-modified HfC coatings using an oxyacetylene flame and heat treatment of HfO₂–Nb₂O₅ plates up to 2100 °C were performed. The results indicate that HfC-30 mol% NbC coating forms a dense oxide film comprising HfO₂ columnar crystals, achieving the best ablation property. At 2100 °C in an argon atmosphere, the solubility of niobium suboxide in HfO₂ is in the range 27–30 mol%, and the stable phases are HfO₂, Nb, and NbO. Nb–O liquids improve the transport of Hf and produce gradients of temperature and oxygen concentration, promoting the formation of a composite film under an oxyacetylene flame.

Original language	English
Article number	111303
Journal	Corrosion Science
Volume	220
DOIs	https://doi.org/10.1016/j.corsci.2023.111303
State	Published - 1 Aug 2023

Keywords

Ablation resistance
Carbon/carbon composites
Film-formation mechanism
HfC–NbC coating
Thermal stability

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10.1016/j.corsci.2023.111303

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title = "Film-forming investigation of NbC-modified HfC coating based on oxyacetylene ablation and argon-atmosphere heating above 2000 °C",

abstract = "Ablation test of NbC-modified HfC coatings using an oxyacetylene flame and heat treatment of HfO2–Nb2O5 plates up to 2100 °C were performed. The results indicate that HfC-30 mol% NbC coating forms a dense oxide film comprising HfO2 columnar crystals, achieving the best ablation property. At 2100 °C in an argon atmosphere, the solubility of niobium suboxide in HfO2 is in the range 27–30 mol%, and the stable phases are HfO2, Nb, and NbO. Nb–O liquids improve the transport of Hf and produce gradients of temperature and oxygen concentration, promoting the formation of a composite film under an oxyacetylene flame.",

keywords = "Ablation resistance, Carbon/carbon composites, Film-formation mechanism, HfC–NbC coating, Thermal stability",

author = "Ruixiang He and Kezhi Li and Wenhao Zhang and Longqi Liu",

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doi = "10.1016/j.corsci.2023.111303",

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T1 - Film-forming investigation of NbC-modified HfC coating based on oxyacetylene ablation and argon-atmosphere heating above 2000 °C

AU - He, Ruixiang

AU - Li, Kezhi

AU - Zhang, Wenhao

AU - Liu, Longqi

PY - 2023/8/1

Y1 - 2023/8/1

N2 - Ablation test of NbC-modified HfC coatings using an oxyacetylene flame and heat treatment of HfO2–Nb2O5 plates up to 2100 °C were performed. The results indicate that HfC-30 mol% NbC coating forms a dense oxide film comprising HfO2 columnar crystals, achieving the best ablation property. At 2100 °C in an argon atmosphere, the solubility of niobium suboxide in HfO2 is in the range 27–30 mol%, and the stable phases are HfO2, Nb, and NbO. Nb–O liquids improve the transport of Hf and produce gradients of temperature and oxygen concentration, promoting the formation of a composite film under an oxyacetylene flame.

AB - Ablation test of NbC-modified HfC coatings using an oxyacetylene flame and heat treatment of HfO2–Nb2O5 plates up to 2100 °C were performed. The results indicate that HfC-30 mol% NbC coating forms a dense oxide film comprising HfO2 columnar crystals, achieving the best ablation property. At 2100 °C in an argon atmosphere, the solubility of niobium suboxide in HfO2 is in the range 27–30 mol%, and the stable phases are HfO2, Nb, and NbO. Nb–O liquids improve the transport of Hf and produce gradients of temperature and oxygen concentration, promoting the formation of a composite film under an oxyacetylene flame.

KW - Ablation resistance

KW - Carbon/carbon composites

KW - Film-formation mechanism

KW - HfC–NbC coating

KW - Thermal stability

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DO - 10.1016/j.corsci.2023.111303

M3 - 文章

AN - SCOPUS:85160778019

SN - 0010-938X

VL - 220

JO - Corrosion Science

JF - Corrosion Science

M1 - 111303

ER -

Film-forming investigation of NbC-modified HfC coating based on oxyacetylene ablation and argon-atmosphere heating above 2000 °C

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Keywords

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