利用溶胶-凝胶法在Ti2AlNb基合金表面制备非晶SiO2涂层,测定了涂层样品和空白样品在800℃和900℃下空气氧化增重动力学数据,通过线性拟合获取试样在不同温度下的氧化速率常数.根据氧化速率常数的Arrhenius关系,计算试样在800℃和900℃高温环境中的氧化激活能.结果表明,涂层样品较空白样品的氧化速率常数降低,氧化激活能升高.
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