Ablation behavior of TaB2[Formula presented] coating for carbon/carbon composites under oxyacetylene torch

Jun Ling Qu; Qian Gang Fu; Jia Ping Zhang; Peng Fei Zhang

doi:10.1016/j.vacuum.2016.06.022

Ablation behavior of TaB₂[Formula presented] coating for carbon/carbon composites under oxyacetylene torch

Jun Ling Qu, Qian Gang Fu, Jia Ping Zhang, Peng Fei Zhang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

33 Scopus citations

Abstract

To protect carbon/carbon (C/C) composites against ablation, a TaB₂[Formula presented] coating was prepared on their surface by pack cementation. Ablation behavior of the coated C/C composites was investigated under oxyacetylene torch. After ablation for 30 s, the linear ablation rate of the TaB₂[Formula presented] coated C/C composites was 4.2 μm/s. Compared with the SiC coated C/C composites and bare C/C composites, the linear ablation rate was reduced by 40% and 51%, respectively. During ablation, a mosaic-structured [Formula presented] glassy layer was formed, playing a positive role in preventing oxidizing species from attacking C/C substrate. Oxidation products of TaB₂, existing as “pinning phases” in the coating, induced the deflection of the crack formed by the attack of oxyacetylene torch, which was beneficial to enhance the stability of TaB₂[Formula presented] coating and improve the ablation resistance.

Original language	English
Pages (from-to)	223-230
Number of pages	8
Journal	Vacuum
Volume	131
DOIs	https://doi.org/10.1016/j.vacuum.2016.06.022
State	Published - 1 Sep 2016

Keywords

Ablation
Coating
Oxyacetylene torch
TaB–SiC

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title = "Ablation behavior of TaB2[Formula presented] coating for carbon/carbon composites under oxyacetylene torch",

abstract = "To protect carbon/carbon (C/C) composites against ablation, a TaB2[Formula presented] coating was prepared on their surface by pack cementation. Ablation behavior of the coated C/C composites was investigated under oxyacetylene torch. After ablation for 30 s, the linear ablation rate of the TaB2[Formula presented] coated C/C composites was 4.2 μm/s. Compared with the SiC coated C/C composites and bare C/C composites, the linear ablation rate was reduced by 40% and 51%, respectively. During ablation, a mosaic-structured [Formula presented] glassy layer was formed, playing a positive role in preventing oxidizing species from attacking C/C substrate. Oxidation products of TaB2, existing as “pinning phases” in the coating, induced the deflection of the crack formed by the attack of oxyacetylene torch, which was beneficial to enhance the stability of TaB2[Formula presented] coating and improve the ablation resistance.",

keywords = "Ablation, Coating, Oxyacetylene torch, TaB–SiC",

author = "Qu, {Jun Ling} and Fu, {Qian Gang} and Zhang, {Jia Ping} and Zhang, {Peng Fei}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

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doi = "10.1016/j.vacuum.2016.06.022",

language = "英语",

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T1 - Ablation behavior of TaB2[Formula presented] coating for carbon/carbon composites under oxyacetylene torch

AU - Qu, Jun Ling

AU - Fu, Qian Gang

AU - Zhang, Jia Ping

AU - Zhang, Peng Fei

PY - 2016/9/1

Y1 - 2016/9/1

N2 - To protect carbon/carbon (C/C) composites against ablation, a TaB2[Formula presented] coating was prepared on their surface by pack cementation. Ablation behavior of the coated C/C composites was investigated under oxyacetylene torch. After ablation for 30 s, the linear ablation rate of the TaB2[Formula presented] coated C/C composites was 4.2 μm/s. Compared with the SiC coated C/C composites and bare C/C composites, the linear ablation rate was reduced by 40% and 51%, respectively. During ablation, a mosaic-structured [Formula presented] glassy layer was formed, playing a positive role in preventing oxidizing species from attacking C/C substrate. Oxidation products of TaB2, existing as “pinning phases” in the coating, induced the deflection of the crack formed by the attack of oxyacetylene torch, which was beneficial to enhance the stability of TaB2[Formula presented] coating and improve the ablation resistance.

AB - To protect carbon/carbon (C/C) composites against ablation, a TaB2[Formula presented] coating was prepared on their surface by pack cementation. Ablation behavior of the coated C/C composites was investigated under oxyacetylene torch. After ablation for 30 s, the linear ablation rate of the TaB2[Formula presented] coated C/C composites was 4.2 μm/s. Compared with the SiC coated C/C composites and bare C/C composites, the linear ablation rate was reduced by 40% and 51%, respectively. During ablation, a mosaic-structured [Formula presented] glassy layer was formed, playing a positive role in preventing oxidizing species from attacking C/C substrate. Oxidation products of TaB2, existing as “pinning phases” in the coating, induced the deflection of the crack formed by the attack of oxyacetylene torch, which was beneficial to enhance the stability of TaB2[Formula presented] coating and improve the ablation resistance.

KW - Ablation

KW - Coating

KW - Oxyacetylene torch

KW - TaB–SiC

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DO - 10.1016/j.vacuum.2016.06.022

M3 - 文章

AN - SCOPUS:84977635661

SN - 0042-207X

VL - 131

SP - 223

EP - 230

JO - Vacuum

JF - Vacuum

ER -

Ablation behavior of TaB₂[Formula presented] coating for carbon/carbon composites under oxyacetylene torch

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Keywords

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