Ablation behavior under oxyacetylene torch of ZrC coating modified by SiC/TaC nanocomposites

Zhang, Yuyu; Sun, Jia; Guo, Lingxiang; Zhang, Xuemeng; Fu, Qiangang

doi:10.1016/j.corsci.2022.110423

Cited by 18 publications

(3 citation statements)

References 47 publications

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“…According to the previous study [12], the FTIR spectrum of P-Ta in Fig. 1 form the Si-C network [33].…”

Section: Molecular Structure and Pyrolysis Of Sspsmentioning

confidence: 77%

“…While their service temperature is restricted by the low melting point of SiO2 (Tm=1650 °C) [8,9]. The ablation resistance of ZrC-SiC coating can be further improved by the addition of TaC since the generated Ta2O5 (Tm=1800 °C [10]) and Zr6Ta2O17 (Tm=1900 °C [11]) have higher melting point, as demonstrated by our previous study of ZrC-SiC/TaC coatings [12]. Yet, the high service temperature brings ablation heat accumulation and a large thermal stress gradient on the surface of the coatings, which will result in large local defects and accelerate the failure of the coating.…”

Section: Introductionmentioning

confidence: 87%

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Heat dissipation of carbon shell in ZrC–SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

Zhang,

et al. 2024

Journal of Advanced Ceramics

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To efficiently decrease the ablation heat accumulation and improve the ablation protective ability of ZrC-SiC/TaC coating on carbon/carbon composites, a J u s t A c c e p t e d 2 thermally conductive nano-network with ceramic@carbon core-shell structure was designed and constructed. Polymer-derived SiC/TaC with graphene carbon shell was synthesized and introduced into ZrC coating by supersonic atmospheric plasma spraying. Graphene shell paths were benefitted in increasing the heat transfer capability by lowering the surface temperature of about 200 °C during oxyacetylene ablation. The heat dissipation of the graphene shell in ZrC-SiC/TaC@C coating reduced the volatilization of low-melting-point phases and delayed the sintering of ZrO2 particles.Thus, the graphene shell in ZrC-SiC/TaC@C coating decreased the mass and linear ablation rates by 91.4 % and 93.7 % compared to ZrC-SiC/TaC coating, respectively. This work provided a constructive idea to improve the ablation resistance of the coatings by incorporating carbon nanomaterials with a function of heat dissipation.

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“…According to the previous study [12], the FTIR spectrum of P-Ta in Fig. 1 form the Si-C network [33].…”

Section: Molecular Structure and Pyrolysis Of Sspsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 87%

Heat dissipation of carbon shell in ZrC–SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

Zhang,

et al. 2024

Journal of Advanced Ceramics

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“…ZrC is a kind of UHTC materials with a high melting point of over 3500 ℃, low density (6.64 g•cm -3 ), good oxidation resistance, and high-temperature creep strength. Many studies have shown that ZrC has the ability to maintain high strength and form refractory ZrO 2 in high temperature environment [10]. Thus, it is a good choice to use ZrC as a surface coating material for Ta-based alloy.…”

Section: Introductionmentioning

confidence: 99%

High speed laser cladding as a new approach to prepare ultra-high temperature ceramic coatings

Deng,

He,

Sun

et al. 2024

Journal of Advanced Ceramics

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Ultra-high temperature ceramic (UHTC) coatings are used to protect the hot-end components of hypervelocity aerocrafts from thermal ablation. This study provides a new approach to fabricate UHTC coatings with high speed laser cladding (HSLC) technology, and places more emphasis on investigating the formation mechanism, phase compositions, and mechanical properties of HSLC-UHTC coatings. Results show that a well-bonded interface between the coating and the tantalum alloy substrate can be formed. The coating is mainly composed of (Zr,Ta)C ceramic solid solution phase with a content of higher than 90% by volume and Ta(W) metal solid solution phase. At a relatively high powder feeding rate, the ZrC ceramic phase appears in the coating while a dense ZrC UHTC top layer with a thickness of up to ~50 μm is successfully fabricated. As for the mechanical properties of the HSLC coatings, the fracture toughness of the coating decreases with the increase of powder feeding rate. The increase of carbide solid solution phase can significantly improve the high temperature microhardness (552.7±1.8 HV 0.5 @1000 ℃). The innovative design of HSLC ZrC-based coatings on refractory alloys accomplishes continuous transitions on microstructure and properties from the substrate to the UHTC top layer, which is a very promising candidate scheme for thermal protection coating.

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Microstructure, mechanical and anti-ablation properties of Mg-modified C/C–ZrC–SiC composites prepared by sol-gel technology

Zheng

Fang²,

Luo³

et al. 2022

Ceramics International

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Ablation behavior under oxyacetylene torch of ZrC coating modified by SiC/TaC nanocomposites

Cited by 18 publications

References 47 publications

Heat dissipation of carbon shell in ZrC–SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

Heat dissipation of carbon shell in ZrC–SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

High speed laser cladding as a new approach to prepare ultra-high temperature ceramic coatings

Microstructure, mechanical and anti-ablation properties of Mg-modified C/C–ZrC–SiC composites prepared by sol-gel technology

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