Observed volatilization behavior of silicon carbide in flowing hydrogen above 2000 K

Benensky, Kelsa M.; Terrani, Kurt A.; Zinkle, S.J.

doi:10.1111/jace.17209

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…Wang et al 19 prepared a HfB 2 -SiC coating on C/C composites, and reported impressive improvement in ablation resistance for 60 s. But when the ablation temperature was higher than 1700 • C, the active oxidation of SiC and the decreasing of SiO 2 viscosity, degraded the ablation performance of the HfB 2 -SiC coating. [20][21][22][23] To reduce the recession of coating caused by SiC active oxidation, one possible solution is to modify the HfB 2 -SiC coating with other silicides. Among the possible silicide additives, TaSi 2 seems to be a suitable choice owing to its high melting point (∼2040 • C) and a higher melting point of Ta 2 O 5 (∼1875 • C) than that of SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

TaSi₂‐modified HfB₂–SiC coating: Preparation and ablation behavior

Zhang,

Hou,

Zhou

et al. 2023

J Am Ceram Soc.

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HfB2–SiC coatings modified with TaSi2 were prepared on carbon/carbon composites by slurry‐dipping combined with gaseous silicon infiltration. The effects of TaSi2 content on the microstructure and ablation performance were investigated. With 20 wt.% addition of TaSi2, the HfB2–SiC coating demonstrated the highest resistance to ablation under an oxyacetylene torch. The good ablation resistance was attributed to the formation of the Hf–Ta–Si–O compound phase, the Hf–Ta–O skeleton and the “sheet‐like” clusters. During ablation, the Hf–Ta–Si–O compound phase healed the defects and inhibited penetration of oxygen. Meanwhile, both the Hf–Ta–O skeleton and the “sheet‐like” clusters with good stability pinned the compound phase. They jointly enhanced the ablation performance of the coating.

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