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To refine microarc oxidation (MAO) coating surface micropores, and enhance the coating's toughness and oxidation resistance. In the process of MAO, negatively charged CeO2 particles are adsorbed and deposited into the coating under the action of electrophoresis, and a 6 g/L CeO2 doped MAO coating is prepared. Then, the Al2O3‐SiO2 composite sol‐gel seal coating was used to obtain the microarc oxidation‐sol‐gel...