HfB2 coating on C/C composites prepared by chemical vapor deposition: Thermodynamics and experimental investigation

Wenhan Gai; Yulei Zhang; Guohui Chen; Jing'an Kong; Pengfei Zhang; Xiaofei Zhu; Tao Li

doi:10.1016/j.ceramint.2022.06.323

HfB₂ coating on C/C composites prepared by chemical vapor deposition: Thermodynamics and experimental investigation

Wenhan Gai, Yulei Zhang, Guohui Chen, Jing'an Kong, Pengfei Zhang, Xiaofei Zhu, Tao Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

12 Scopus citations

Abstract

A thermodynamic calculation on the HfB₂ coating prepared by chemical vapor deposition (CVD) through HfCl₄-BCl₃-H₂-Ar system was performed, together with the relevant verification experiments. The calculation results indicated that HfB₂ coating could be obtained above 900 °C with the ratios of BCl₃/HfCl₄ and H₂/HfCl₄ higher than 1 and 12, respectively. The experimental results demonstrated that the deposition temperature, H₂ and BCl₃ flow rates had significant effects on the grain size, growth rate and phase composition of HfB₂ coatings. A dense and uniform HfB₂ coating was prepared at 1150 °C with a BCl₃/HfCl₄ ratio of 3 and a H₂/HfCl₄ ratio of 20, whose mass and linear ablation rates were 15.61 mg/s and 15.58 μm/s under oxyacetylene flame.

Original language	English
Pages (from-to)	31354-31362
Number of pages	9
Journal	Ceramics International
Volume	48
Issue number	21
DOIs	https://doi.org/10.1016/j.ceramint.2022.06.323
State	Published - 1 Nov 2022

Keywords

C/C composites
Chemical vapor deposition
HfB coating
Thermodynamic calculation

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10.1016/j.ceramint.2022.06.323

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@article{1f34022a7e69482e8e93dc2095d13d7b,

title = "HfB2 coating on C/C composites prepared by chemical vapor deposition: Thermodynamics and experimental investigation",

abstract = "A thermodynamic calculation on the HfB2 coating prepared by chemical vapor deposition (CVD) through HfCl4-BCl3-H2-Ar system was performed, together with the relevant verification experiments. The calculation results indicated that HfB2 coating could be obtained above 900 °C with the ratios of BCl3/HfCl4 and H2/HfCl4 higher than 1 and 12, respectively. The experimental results demonstrated that the deposition temperature, H2 and BCl3 flow rates had significant effects on the grain size, growth rate and phase composition of HfB2 coatings. A dense and uniform HfB2 coating was prepared at 1150 °C with a BCl3/HfCl4 ratio of 3 and a H2/HfCl4 ratio of 20, whose mass and linear ablation rates were 15.61 mg/s and 15.58 μm/s under oxyacetylene flame.",

keywords = "C/C composites, Chemical vapor deposition, HfB coating, Thermodynamic calculation",

author = "Wenhan Gai and Yulei Zhang and Guohui Chen and Jing'an Kong and Pengfei Zhang and Xiaofei Zhu and Tao Li",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",

year = "2022",

month = nov,

day = "1",

doi = "10.1016/j.ceramint.2022.06.323",

language = "英语",

volume = "48",

pages = "31354--31362",

journal = "Ceramics International",

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TY - JOUR

T1 - HfB2 coating on C/C composites prepared by chemical vapor deposition

T2 - Thermodynamics and experimental investigation

AU - Gai, Wenhan

AU - Zhang, Yulei

AU - Chen, Guohui

AU - Kong, Jing'an

AU - Zhang, Pengfei

AU - Zhu, Xiaofei

AU - Li, Tao

PY - 2022/11/1

Y1 - 2022/11/1

N2 - A thermodynamic calculation on the HfB2 coating prepared by chemical vapor deposition (CVD) through HfCl4-BCl3-H2-Ar system was performed, together with the relevant verification experiments. The calculation results indicated that HfB2 coating could be obtained above 900 °C with the ratios of BCl3/HfCl4 and H2/HfCl4 higher than 1 and 12, respectively. The experimental results demonstrated that the deposition temperature, H2 and BCl3 flow rates had significant effects on the grain size, growth rate and phase composition of HfB2 coatings. A dense and uniform HfB2 coating was prepared at 1150 °C with a BCl3/HfCl4 ratio of 3 and a H2/HfCl4 ratio of 20, whose mass and linear ablation rates were 15.61 mg/s and 15.58 μm/s under oxyacetylene flame.

AB - A thermodynamic calculation on the HfB2 coating prepared by chemical vapor deposition (CVD) through HfCl4-BCl3-H2-Ar system was performed, together with the relevant verification experiments. The calculation results indicated that HfB2 coating could be obtained above 900 °C with the ratios of BCl3/HfCl4 and H2/HfCl4 higher than 1 and 12, respectively. The experimental results demonstrated that the deposition temperature, H2 and BCl3 flow rates had significant effects on the grain size, growth rate and phase composition of HfB2 coatings. A dense and uniform HfB2 coating was prepared at 1150 °C with a BCl3/HfCl4 ratio of 3 and a H2/HfCl4 ratio of 20, whose mass and linear ablation rates were 15.61 mg/s and 15.58 μm/s under oxyacetylene flame.

KW - C/C composites

KW - Chemical vapor deposition

KW - HfB coating

KW - Thermodynamic calculation

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U2 - 10.1016/j.ceramint.2022.06.323

DO - 10.1016/j.ceramint.2022.06.323

M3 - 文章

AN - SCOPUS:85134820487

SN - 0272-8842

VL - 48

SP - 31354

EP - 31362

JO - Ceramics International

JF - Ceramics International

IS - 21

ER -

HfB₂ coating on C/C composites prepared by chemical vapor deposition: Thermodynamics and experimental investigation

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