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以异丙醇铝(Al(OC3H7)3)和氧氯化锆(ZrOCl2·8H2O)为原料,采用溶胶-凝胶法在γ-TiAl基合金表面制备Al2O3/ZrO2涂层。研究涂层试样和空白试样在1000℃静态空气中的长期氧化行为和循环氧化行为。结果表明:Al2O3/ZrO2涂层降低了该合金的氧化速率,提高了合金的抗循环氧化能力。对涂层的作用机制进行了探讨。
Al2O3 / ZrO2 coatings were prepared on γ-TiAl-based alloy by sol-gel method using aluminum isopropoxide (Al (OC3H7) 3) and zirconium oxychloride (ZrOCl2 · 8H2O) as raw materials. The long-term oxidation behavior and cyclic oxidation behavior of the coated and blank samples in static air at 1000 ℃ were investigated. The results show that Al2O3 / ZrO2 coating can reduce the oxidation rate and improve the cyclic oxidation resistance of the alloy. The mechanism of the coating is discussed.