Ablation behavior of C/SiC-HfC composites in the plasma wind tunnel

Luo, Lei; Wang, Yiguang; Duan, Liuyang; Liu, Liping; Wang, Guolin

doi:10.1016/j.jeurceramsoc.2016.03.017

Cited by 83 publications

(32 citation statements)

References 52 publications

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“…5, temperature jump phenomena are detected for S2 and S3 probably due to the formation of white products, which is different from the observations for C/SiC and C/SiC-HfC composites. 28,29 Additional experimental verication including theoretical analysis is needed to explain the temperature jump phenomenon of Hf-based CBCFs under an oxidation environment. Fig.…”

Section: Ablation Properties Of Cbcfs With the Hf-based Coatingmentioning

confidence: 99%

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Fabrication of low-density carbon-bonded carbon fiber composites with an Hf-based coating for high temperature applications

Yang

Fan

et al. 2018

RSC Adv.

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Section: Ablation Properties Of Cbcfs With the Hf-based Coatingmentioning

confidence: 99%

“…A small amount of residual Si is also detected by XRD. The results indicate that most of the impregnated ceramic powders have reacted in situ with each other or with carbon to form the HfB 2 -Hf 2 Si-SiC coating, which can afford good oxidation protection under high temperature 27,28.…”

mentioning

confidence: 99%

Fabrication of low-density carbon-bonded carbon fiber composites with an Hf-based coating for high temperature applications

Yang

Fan

et al. 2018

RSC Adv.

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“…Thus, thermal protection systems (TPS) have become essential for hypersonic flights. Carbon fiber reinforced silicon carbide (C/SiC) composite ZrC [13,14], TaC [15,16], HfB 2 [17,18], and HfC [19,20]. Among them, HfC not only has the highest melting point (about 3890 ℃), but also its oxide HfO 2 has the highest melting point (about 2810 ℃) among the oxides of UHTCs [21,22].…”

Section: Introduction mentioning

confidence: 99%

“…Consequently, HfC was often introduced into C/SiC composites as an ideal UHTC to form modified C/SiC-HfC composite. In our previous study [20], the influence of catalysis on the ablation behaviors of C/SiC-HfC composite prepared by reactive melt infiltration (RMI) was revealed. However, the diffusion mechanism of volatiles in ablation process is still not clear, which is related to the microstructures of C/SiC-HfC composites.…”

Section: Introduction mentioning

confidence: 99%

Ablation of C/SiC-HfC composite prepared by precursor infiltration and pyrolysis in plasma wind tunnel

Duan

Luo²,

Liu

et al. 2020

J Adv Ceram

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Carbon fiber reinforced silicon carbide-hafnium carbide (C/SiC-HfC) composite was prepared by precursor infiltration and pyrolysis process. Then, ablation behavior of C/SiC-HfC was evaluated in plasma wind tunnel. It was found that oxide layer formed during ablation significantly influenced the surface temperature. Formation of dense HfO 2-SiO 2 layer under low heat flux led to stable surface temperature. Silica (SiO 2) on the surface was gradually consumed when heat flux increased, resulting in conversion of HfO 2-SiO 2 on the surface to HfO 2. Converted HfO 2 with high catalytic coefficient absorbed more energy, causing gradual increase in the surface temperature. Formed oxide layer was destroyed at high heat flux and high stagnation point pressure. After carbon fiber lost the protection of HfO 2-SiO 2 layer, it burned immediately, leading to surface temperature jump.

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“…Hafnium carbide (HfC) exhibits high thermodynamic stability with a melting point of ~3900°C, high hardness and Young’ s modulus, as well as good thermomechanical properties at ultra high temperature . Therefore, it is considered as a promising material for applications of high‐temperature electrodes, cutting tools, rocket nozzles, nuclear reactor rods, space/air craft and thermal‐field emitters Nevertheless, HfC exhibits a low fracture toughness (1.73‐3.40 MPa m 1/2 ), which can limit its structural applications in extreme environments .…”

Section: Introductionmentioning

confidence: 99%

High fracture toughness of HfC through nano‐scale templating and novel sintering aids

Hao

Guo

et al. 2018

J Am Ceram Soc

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An approach to improve the sintering ability and the fracture toughness of hafnium carbide (HfC) ceramic by designing a unique composite structure is reported. The uniform and ultra‐fine HfC nanoparticles (~300 nm) are synthesized at 1450°C by vacuum carbonization reaction with the glucose‐derived hydrothermal precursor as a carbon source and template. HfC ceramic sintered with a SiCN sintering aid of 15 vol. % possesses a beneficial three‐dimensional network microstructure composed of inter‐penetrating phases of carbon, SiC and HfC with varied stoichiometry at multi‐length scales. The obtained HfC exhibits a higher fracture toughness of 5.5 MPa m1/2, which can be attributed to the unique composite structure able to promote stress releases in the crack tip and enhance the resistance to crack propagation.

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Ablation behavior of C/SiC-HfC composites in the plasma wind tunnel

Cited by 83 publications

References 52 publications

Fabrication of low-density carbon-bonded carbon fiber composites with an Hf-based coating for high temperature applications

Fabrication of low-density carbon-bonded carbon fiber composites with an Hf-based coating for high temperature applications

Ablation of C/SiC-HfC composite prepared by precursor infiltration and pyrolysis in plasma wind tunnel

High fracture toughness of HfC through nano‐scale templating and novel sintering aids

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