Microstructure, mechanical properties and ablation behavior of ultra-high-temperature Ta-Hf-C solid solution coating prepared by a step-by-step plasma solid solution method
| Autor: | Z.Y. Tan, Li Yang, Q. Wu, Zhu Wang, L.J. Gong, Yang Zhou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science medicine.medical_treatment 02 engineering and technology Surfaces and Interfaces General Chemistry Plasma Nanoindentation engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Ablation Microstructure 01 natural sciences Surfaces Coatings and Films Coating 0103 physical sciences Materials Chemistry medicine engineering Composite material 0210 nano-technology Ternary operation Elastic modulus Solid solution |
| Zdroj: | Surface and Coatings Technology. 403:126405 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2020.126405 |
| Popis: | Ultra-high-temperature Ta-Hf-C solid solution coating is successfully prepared by induction plasma spheroidization (IPS) combine with vacuum plasma spraying (VPS). The microstructure, mechanical properties and ablation performance of the Ta-Hf-C coating are investigated. Results show that the as-sprayed coating is a solid solution Ta-Hf-C ternary ceramic coating. The highest average hardness and elastic modulus obtained by nanoindentation are 28.05 GPa and 307.35 GPa, respectively. The coating exhibits a good ablation resistance under heat flux of 4.18 MW/m2. After 30 s ablation, the mass and linear ablation rates of the Ta-Hf-C coating are −0.58 mg/s and −0.94 μm/s, respectively. The ablation resistance mechanism is studied. The formation of Hf6Ta2O17 on the coating surface and the Ta-Hf-C-O intermediate transition layer in the coating slow down the ablation and improve the ability to resist ultra-high temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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