Microstructure and ablation performance of HfC/PyC core-shell structure nanowire-reinforced Hf1-xZrxC coating

Jincui Ren; Chaofeng Lv; Yuting Duan; Yulei Zhang; Jian Zhang

doi:10.1016/j.jeurceramsoc.2021.08.036

Microstructure and ablation performance of HfC/PyC core-shell structure nanowire-reinforced Hf_1-xZr_xC coating

Jincui Ren, Chaofeng Lv, Yuting Duan, Yulei Zhang, Jian Zhang

School of Materials Sience and Engineering

Xi'an University of Architecture and Technology

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

19 Scopus citations

Abstract

To improve the ablation performance of C/C composites, HfC/PyC core-shell structure nanowire (HfCnw/PyC)-reinforced Hf_1-xZr_xC coating was prepared via three-step chemical vapor deposition (CVD) method. Effects of HfCnw/PyC and PyC layer thickness on the microstructure, residual stress and ablation performance of Hf_1-xZr_xC coating were studied. HfCnw/PyC-reinforced coatings exhibited equiaxial crystal structure. After incorporating HfCnw/PyC, ablation property of Hf_1-xZr_xC coating was enhanced because of the skeleton role of HfO₂ nanowires. PyC possessed low coefficient of thermal expansion (CTE) and high heat conductivity, but poor ablation performance. Hence, with the increase in thickness of PyC layer, ablation property of the coating first increased and then decreased. HfCnw/PyC-reinforced Hf_1-xZr_xC coating with PyC layer thickness of about 50 nm exhibited the best ablation property.

Original language	English
Pages (from-to)	7450-7463
Number of pages	14
Journal	Journal of the European Ceramic Society
Volume	41
Issue number	15
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2021.08.036
State	Published - Dec 2021

Keywords

Ablation performance
C/C composites
Carbide coating
Core-shell structure nanowire
Microstructure

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10.1016/j.jeurceramsoc.2021.08.036

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title = "Microstructure and ablation performance of HfC/PyC core-shell structure nanowire-reinforced Hf1-xZrxC coating",

abstract = "To improve the ablation performance of C/C composites, HfC/PyC core-shell structure nanowire (HfCnw/PyC)-reinforced Hf1-xZrxC coating was prepared via three-step chemical vapor deposition (CVD) method. Effects of HfCnw/PyC and PyC layer thickness on the microstructure, residual stress and ablation performance of Hf1-xZrxC coating were studied. HfCnw/PyC-reinforced coatings exhibited equiaxial crystal structure. After incorporating HfCnw/PyC, ablation property of Hf1-xZrxC coating was enhanced because of the skeleton role of HfO2 nanowires. PyC possessed low coefficient of thermal expansion (CTE) and high heat conductivity, but poor ablation performance. Hence, with the increase in thickness of PyC layer, ablation property of the coating first increased and then decreased. HfCnw/PyC-reinforced Hf1-xZrxC coating with PyC layer thickness of about 50 nm exhibited the best ablation property.",

keywords = "Ablation performance, C/C composites, Carbide coating, Core-shell structure nanowire, Microstructure",

author = "Jincui Ren and Chaofeng Lv and Yuting Duan and Yulei Zhang and Jian Zhang",

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

year = "2021",

month = dec,

doi = "10.1016/j.jeurceramsoc.2021.08.036",

language = "英语",

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T1 - Microstructure and ablation performance of HfC/PyC core-shell structure nanowire-reinforced Hf1-xZrxC coating

AU - Ren, Jincui

AU - Lv, Chaofeng

AU - Duan, Yuting

AU - Zhang, Yulei

AU - Zhang, Jian

PY - 2021/12

Y1 - 2021/12

N2 - To improve the ablation performance of C/C composites, HfC/PyC core-shell structure nanowire (HfCnw/PyC)-reinforced Hf1-xZrxC coating was prepared via three-step chemical vapor deposition (CVD) method. Effects of HfCnw/PyC and PyC layer thickness on the microstructure, residual stress and ablation performance of Hf1-xZrxC coating were studied. HfCnw/PyC-reinforced coatings exhibited equiaxial crystal structure. After incorporating HfCnw/PyC, ablation property of Hf1-xZrxC coating was enhanced because of the skeleton role of HfO2 nanowires. PyC possessed low coefficient of thermal expansion (CTE) and high heat conductivity, but poor ablation performance. Hence, with the increase in thickness of PyC layer, ablation property of the coating first increased and then decreased. HfCnw/PyC-reinforced Hf1-xZrxC coating with PyC layer thickness of about 50 nm exhibited the best ablation property.

AB - To improve the ablation performance of C/C composites, HfC/PyC core-shell structure nanowire (HfCnw/PyC)-reinforced Hf1-xZrxC coating was prepared via three-step chemical vapor deposition (CVD) method. Effects of HfCnw/PyC and PyC layer thickness on the microstructure, residual stress and ablation performance of Hf1-xZrxC coating were studied. HfCnw/PyC-reinforced coatings exhibited equiaxial crystal structure. After incorporating HfCnw/PyC, ablation property of Hf1-xZrxC coating was enhanced because of the skeleton role of HfO2 nanowires. PyC possessed low coefficient of thermal expansion (CTE) and high heat conductivity, but poor ablation performance. Hence, with the increase in thickness of PyC layer, ablation property of the coating first increased and then decreased. HfCnw/PyC-reinforced Hf1-xZrxC coating with PyC layer thickness of about 50 nm exhibited the best ablation property.

KW - Ablation performance

KW - C/C composites

KW - Carbide coating

KW - Core-shell structure nanowire

KW - Microstructure

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DO - 10.1016/j.jeurceramsoc.2021.08.036

M3 - 文章

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SN - 0955-2219

VL - 41

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 15

ER -

Microstructure and ablation performance of HfC/PyC core-shell structure nanowire-reinforced Hf_1-xZr_xC coating

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