High-temperature phase composition, crystal stabilisation, and interfacial diffusion of (NbC-ZrC)/SiC double-layer coated C/C composites enduring the oxyacetylene flame

Ruixiang He; Kezhi Li; Qian Liu

doi:10.1016/j.corsci.2021.109541

High-temperature phase composition, crystal stabilisation, and interfacial diffusion of (NbC-ZrC)/SiC double-layer coated C/C composites enduring the oxyacetylene flame

Ruixiang He, Kezhi Li, Qian Liu

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

17 引用（Scopus）

摘要

Among NbC-ZrC coatings, an NbC coating modified with 30 mol.% ZrC achieves the best ablation-resistant property. It generates a liquid 10 μm-thick oxide film mainly composed of NbO and highly thermal-stable Nb_xZr_1-_xO₂ phases. Furthermore, Nb⁴⁺ with a smaller ionic radius replaces Zr⁴⁺ and the transformation of NbO into Nb₂O₅ in air produces compressive stress stabilize the t-ZrO₂ crystals. Significantly, a 1−2 μm-thick Nb-rich layer formed by reaction-diffusion between SiC and niobium suboxide (NbO₂ and NbO) acts as a barrier to infiltrating oxygen, which provides interfacial anti-oxidation protection for the SiC transition layer during the oxyacetylene test.

源语言	英语
文章编号	109541
期刊	Corrosion Science
卷	188
DOI	https://doi.org/10.1016/j.corsci.2021.109541
出版状态	已出版 - 1 8月 2021

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title = "High-temperature phase composition, crystal stabilisation, and interfacial diffusion of (NbC-ZrC)/SiC double-layer coated C/C composites enduring the oxyacetylene flame",

abstract = "Among NbC-ZrC coatings, an NbC coating modified with 30 mol.% ZrC achieves the best ablation-resistant property. It generates a liquid 10 μm-thick oxide film mainly composed of NbO and highly thermal-stable NbxZr1-xO2 phases. Furthermore, Nb4+ with a smaller ionic radius replaces Zr4+ and the transformation of NbO into Nb2O5 in air produces compressive stress stabilize the t-ZrO2 crystals. Significantly, a 1−2 μm-thick Nb-rich layer formed by reaction-diffusion between SiC and niobium suboxide (NbO2 and NbO) acts as a barrier to infiltrating oxygen, which provides interfacial anti-oxidation protection for the SiC transition layer during the oxyacetylene test.",

keywords = "Ablation resistance, Carbon/carbon composites, Crystal stabilisation, High-temperature phase, Interfacial diffusion, NbC-ZrC coating",

author = "Ruixiang He and Kezhi Li and Qian Liu",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

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doi = "10.1016/j.corsci.2021.109541",

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T1 - High-temperature phase composition, crystal stabilisation, and interfacial diffusion of (NbC-ZrC)/SiC double-layer coated C/C composites enduring the oxyacetylene flame

AU - He, Ruixiang

AU - Li, Kezhi

AU - Liu, Qian

PY - 2021/8/1

Y1 - 2021/8/1

N2 - Among NbC-ZrC coatings, an NbC coating modified with 30 mol.% ZrC achieves the best ablation-resistant property. It generates a liquid 10 μm-thick oxide film mainly composed of NbO and highly thermal-stable NbxZr1-xO2 phases. Furthermore, Nb4+ with a smaller ionic radius replaces Zr4+ and the transformation of NbO into Nb2O5 in air produces compressive stress stabilize the t-ZrO2 crystals. Significantly, a 1−2 μm-thick Nb-rich layer formed by reaction-diffusion between SiC and niobium suboxide (NbO2 and NbO) acts as a barrier to infiltrating oxygen, which provides interfacial anti-oxidation protection for the SiC transition layer during the oxyacetylene test.

AB - Among NbC-ZrC coatings, an NbC coating modified with 30 mol.% ZrC achieves the best ablation-resistant property. It generates a liquid 10 μm-thick oxide film mainly composed of NbO and highly thermal-stable NbxZr1-xO2 phases. Furthermore, Nb4+ with a smaller ionic radius replaces Zr4+ and the transformation of NbO into Nb2O5 in air produces compressive stress stabilize the t-ZrO2 crystals. Significantly, a 1−2 μm-thick Nb-rich layer formed by reaction-diffusion between SiC and niobium suboxide (NbO2 and NbO) acts as a barrier to infiltrating oxygen, which provides interfacial anti-oxidation protection for the SiC transition layer during the oxyacetylene test.

KW - Ablation resistance

KW - Carbon/carbon composites

KW - Crystal stabilisation

KW - High-temperature phase

KW - Interfacial diffusion

KW - NbC-ZrC coating

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VL - 188

JO - Corrosion Science

JF - Corrosion Science

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High-temperature phase composition, crystal stabilisation, and interfacial diffusion of (NbC-ZrC)/SiC double-layer coated C/C composites enduring the oxyacetylene flame

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