Sublayer design and ablation resistance of CVD-TaC alternate coatings with different crystallite morphologies for C/C composites

Jing'an Kong; Yulei Zhang; Hanhui Wang; Guohui Chen; Wenhan Gai; Pengfei Zhang; Hejun Li

doi:10.1016/j.jmst.2022.08.045

Sublayer design and ablation resistance of CVD-TaC alternate coatings with different crystallite morphologies for C/C composites

Jing'an Kong, Yulei Zhang, Hanhui Wang, Guohui Chen, Wenhan Gai, Pengfei Zhang, Hejun Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

13 Scopus citations

Abstract

Tantalum carbon (TaC) alternate coatings with sublayers comprised of different crystallite morphologies were prepared on carbon/carbon composites by chemical vapor deposition. Their ablative behaviors and defending mechanisms were both investigated. The specimen with the sublayer composed of columnar crystals exhibited a better ablation resistance due to the toughness enhancement induced by the laminated structure. However, the mechanical denudation of the sample only containing acicular crystals and the coating spallation caused by superfluous gaseous products of the sample with the sublayer composed of nanocrystals both indicate their inferior anti-ablation properties. It is believed that the results will be helpful for the structural design and practical application of chemical vapor deposition (CVD) alternate coatings.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Journal of Materials Science and Technology
Volume	141
DOIs	https://doi.org/10.1016/j.jmst.2022.08.045
State	Published - 1 Apr 2023

Keywords

Ablation behavior
Alternate coating
Carbon/carbon composite
Chemical vapor deposition
Crystallite morphology

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10.1016/j.jmst.2022.08.045

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title = "Sublayer design and ablation resistance of CVD-TaC alternate coatings with different crystallite morphologies for C/C composites",

abstract = "Tantalum carbon (TaC) alternate coatings with sublayers comprised of different crystallite morphologies were prepared on carbon/carbon composites by chemical vapor deposition. Their ablative behaviors and defending mechanisms were both investigated. The specimen with the sublayer composed of columnar crystals exhibited a better ablation resistance due to the toughness enhancement induced by the laminated structure. However, the mechanical denudation of the sample only containing acicular crystals and the coating spallation caused by superfluous gaseous products of the sample with the sublayer composed of nanocrystals both indicate their inferior anti-ablation properties. It is believed that the results will be helpful for the structural design and practical application of chemical vapor deposition (CVD) alternate coatings.",

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AU - Kong, Jing'an

AU - Zhang, Yulei

AU - Wang, Hanhui

AU - Chen, Guohui

AU - Gai, Wenhan

AU - Zhang, Pengfei

AU - Li, Hejun

PY - 2023/4/1

Y1 - 2023/4/1

N2 - Tantalum carbon (TaC) alternate coatings with sublayers comprised of different crystallite morphologies were prepared on carbon/carbon composites by chemical vapor deposition. Their ablative behaviors and defending mechanisms were both investigated. The specimen with the sublayer composed of columnar crystals exhibited a better ablation resistance due to the toughness enhancement induced by the laminated structure. However, the mechanical denudation of the sample only containing acicular crystals and the coating spallation caused by superfluous gaseous products of the sample with the sublayer composed of nanocrystals both indicate their inferior anti-ablation properties. It is believed that the results will be helpful for the structural design and practical application of chemical vapor deposition (CVD) alternate coatings.

AB - Tantalum carbon (TaC) alternate coatings with sublayers comprised of different crystallite morphologies were prepared on carbon/carbon composites by chemical vapor deposition. Their ablative behaviors and defending mechanisms were both investigated. The specimen with the sublayer composed of columnar crystals exhibited a better ablation resistance due to the toughness enhancement induced by the laminated structure. However, the mechanical denudation of the sample only containing acicular crystals and the coating spallation caused by superfluous gaseous products of the sample with the sublayer composed of nanocrystals both indicate their inferior anti-ablation properties. It is believed that the results will be helpful for the structural design and practical application of chemical vapor deposition (CVD) alternate coatings.

KW - Ablation behavior

KW - Alternate coating

KW - Carbon/carbon composite

KW - Chemical vapor deposition

KW - Crystallite morphology

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JO - Journal of Materials Science and Technology

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Sublayer design and ablation resistance of CVD-TaC alternate coatings with different crystallite morphologies for C/C composites

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Keywords

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