Ablation resistance of HfC-TaC-Hf6Ta2O17 composite coatings prepared by vacuum plasma spraying
Source abstract
Abstract
HfC-TaC-Hf 6Ta 2O 17 composite coatings are successfully prepared by vacuum plasma spraying. The microstructure and forming mechanism of the coating are investigated. As a melt adhesive, Hf 6Ta 2O 17 reduces the porosity of composite coatings. After the ablation assessment under heat flux of 4.18 MW/m 2, the HT10 coating (80 vol% HfC-10 vol% TaC-10 vol% Hf 6Ta 2O 17) shows the best ablation performance (−0.4 µm/s, −0.5 mg/s). Hf 6Ta 2O 17 can effectively prevent the formation of low melting point Ta-O phase from damaging the structural integrity of the oxide layer. The acquisition of Hf 6Ta 2O 17 oxidation products occupies a more critical position in the enhancement of anti-ablation performance of Ta-Hf-C coating.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Semiconductor materials and devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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