Abstract
To improve the limited ablation resistance of Zr-Ta-O compound film induced by Ta continuous enrichment, phase diagram design and ablation tests (4.2 MW/m2) were conducted to obtain an appropriate modification strategy. The Zr6Ta2O17 intermediate phase was synthesized and introduced into plasma sprayed ZrC coatings. Compared with ZrC coating, the linear variation rate of ZrC-5 vol% Zr6Ta2O17 coating was decreased by 80%. The greatly improved ablation performance was attributed to the weakening effect of minor Ta solid solution on the Zr-O covalent bond and appropriate addition amount of Zr6Ta2O17 phase to keep Ta/Zr molar ratio under a low level (Ta/Zr < 1/11).
Published Version
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