Effect of PyC-SiC double-layer interface on ablation behaviour of impacted CVD-SiCnws/HfC coating

Mu, Tong; Fu, Qiangang; Liang, Mei; Feng, Tao; Hou, Wanbo; Sun, Jia; Shi, Xinhao

doi:10.1016/j.corsci.2021.109741

Cited by 23 publications

(5 citation statements)

References 35 publications

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“…As shown in Figure 5B, the fiber pull‐out phenomenon can be observed, and it was preserved more completely. It indicated that the PyC and BN interface layer can protect the fibers, the fibers would be debonded and pulled out when the SiC nf /SiC composites were subjected to the external force, the interface layer consuming the energy, resulting in the cracks deflected and the expansion of the crack slowly, then the SiC nf /SiC composites was toughened 30,31 …”

Section: Resultsmentioning

confidence: 99%

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Tao,

Lou,

et al. 2024

Int J Applied Ceramic Tech

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Silicon carbide nanofiber/silicon carbide (SiCnf/SiC) composites with a laminar stacking structure were prepared by the slurry impregnation hot‐press sintering using aluminum (Al) powder, boron (B) powder, and carbon black as sintering aids. SiCnf paper was fabricated using nanofibers and impregnated with the slurry of SiCnp and sintering aids, and the SiCnf/SiC preforms were fabricated by the alternating stack of the SiCnf paper and SiCnp. The pyrolysis carbon and boron nitride interface layers were deposited on the surface of SiCnf by chemical vapor deposition and vacuum impregnation‐pyrolysis methods. The effects of different sintering temperatures on the relative density, porosity, sectional microscopic morphology, and mechanical properties of the composites were investigated. The results show that the fracture toughness of SiCnf/SiC composites is significantly improved. The mechanical properties of the composites were optimized at a sintering temperature of 1950°C and a sintering pressure of 30 MPa, with flexural strength and fracture toughness of 548 MPa and 15.86 MPa·m1/2, respectively. The liquid phase Al8B4C7 compound generated at the high temperature promoted the densification of the composites.

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Section: Resultsmentioning

confidence: 99%

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Tao,

Lou,

et al. 2024

Int J Applied Ceramic Tech

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“…Our research group have intensively investigated different ceramic nanowires@PyC (SiCNWs@PyC, HfCNWs@PyC) as core-shell structured nanoreinforcements in antioxidation and antiablation coatings. [203,206,207,223,[239][240][241][242][243] PyC layer not only reduced residual stress, but also increased the hardness, elastic modulus, fracture toughness, and bonding strength of the ceramic coating, ensuring that the coating has excellent oxidation/ablation resistance.…”

Section: Chemically Bonded Core-shell 1d Nanostructures Reinforced C/...mentioning

confidence: 99%

Recent Progress in 1D Nanostructures Reinforced Carbon/Carbon Composites

Yin

Han

Liu

et al. 2022

Adv Funct Materials

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Carbon fiber reinforced carbon matrix (carbon/carbon, C/C) composites have become the promising candidates for high‐temperature thermal structure materials in aerospace fields, owning to a series of excellent structural merits. However, for aculeate or thin‐walled C/C composites, due to the fact that continuous carbon fibers are cut off during the machining process and the amount of residual carbon fibers is limited, carbon matrix cannot be effectively strengthened just by using carbon fibers, resulting in a sharp decline in mechanical performance. Furthermore, the rapid development of aerospace vehicles requires that C/C composites not only have excellent mechanical properties but also possess multifunctional properties. To effectively solve these problems and meet the increasing demands, various 1D nanostructures as nanoreinforcements have been introduced into C/C composites, achieving the great improvement in mechanical and functional properties. In this review, the state‐of‐the‐art research activities regarding different 1D nanoreinforcements applied in C/C composites are systematically summarized. Finally, this review is concluded and the future research prospects are proposed. This review provides the “1D nanoreinforcements” strategy to further improve the properties of C/C composites, which could be widely used for reference by researchers in the fields of different fiber/matrix composites.

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“…After 60 s of oxyacetylene ablation with the temperature of 2200 • C, the coating maintained intact. Due to the high melting point, high strength and oxidation resistance of SiC nws , 29 SiC nws have been chosen for the reinforcement of HfC-based coatings. From the experimental results of our previous work, the UHTC coatings toughened by SiC nws have a good toughening effect under quasi-static loading, but significant "traumas" would be generated when the coatings underwent impact loading (as shown in Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Effect on BN interphase thickness upon SiC_nws@BN/HfC coating performance under impact and ablation environment

Tong,

Fu,

Feng

et al. 2023

Int J Applied Ceramic Tech

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To inhibit the negative influence of impact on ablation performance of HfC coating reinforced by SiC nanowires (SiCnws/HfC coatings), BN interphases were fabricated and introduced into SiCnws/HfC coatings by chemical vapor deposition. The effect on BN interphase thickness upon SiCnws@BN/HfC coatings performance under impact‐ablation environment was investigated. The interphase thickness was adjusted by changing the deposition time of BN. Impact and ablation tests were carried out by drop hammer and oxyacetylene ablation devices. Among the prepared coatings, the one with 150±20 nm thickness interphase possessed a good performance under impact test, of which the crack propagation path exhibited a significant deflection. After ablation, the coating could still maintain intact surface, because the interphase thickness of 150±20 nm was appropriate to ensure the toughness of the coating and to avoid the porous structure formation.This article is protected by copyright. All rights reserved

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Effect of PyC-SiC double-layer interface on ablation behaviour of impacted CVD-SiCnws/HfC coating

Cited by 23 publications

References 35 publications

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Recent Progress in 1D Nanostructures Reinforced Carbon/Carbon Composites

Effect on BN interphase thickness upon SiC_nws@BN/HfC coating performance under impact and ablation environment

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Effect of PyC-SiC double-layer interface on ablation behaviour of impacted CVD-SiCnws/HfC coating

Cited by 23 publications

References 35 publications

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Slurry‐impregnating hot‐press sintered silicon carbide nanofiber/silicon carbide composites with Al‐B‐C as sintering additives

Recent Progress in 1D Nanostructures Reinforced Carbon/Carbon Composites

Effect on BN interphase thickness upon SiCnws@BN/HfC coating performance under impact and ablation environment

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Effect on BN interphase thickness upon SiC_nws@BN/HfC coating performance under impact and ablation environment