Oxidation studies of ZrB2 were performed under wet air and dry air conditions at 1200, 1400 and 1500°C for 1, 4 and 10h. Compared to dry air, the presence of water vapor was found to enhance the oxidation kinetics by a factor of 7 to 30, depending on the temperature. Thermodynamic calculations suggested that water vapor promoted the formation of additional volatile species such as boric acid (HBO2), in addition to boria (B2O3) produced in dry air, which increased the evaporation rate of B2O3. Compared to dry air, the presence of water vapor leads to more rapid evaporation of boria and the transition from parabolic oxidation kinetic behavior (i.e., rate controlled by diffusion through boria) to linear (i.e., underlying ZrB2 is directly exposed to the oxidizing environment) at shorter times and lower temperatures.

中文翻译：

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水分对ZrB 2 氧化行为的影响

ZrB2 的氧化研究在湿空气和干空气条件下在 1200、1400 和 1500°C 下进行 1、4 和 10 小时。与干燥空气相比，发现水蒸气的存在将氧化动力学提高了 7 到 30 倍，具体取决于温度。热力学计算表明，除了在干燥空气中产生的氧化硼 (B2O3) 外，水蒸气还促进了硼酸 (HBO2) 等其他挥发性物质的形成，从而提高了 B2O3 的蒸发速率。与干燥空气相比，水蒸气的存在导致氧化硼更快蒸发，并从抛物线氧化动力学行为（即通过氧化硼控制的速率）转变为线性（即底层 ZrB2 直接暴露于氧化环境）在更短的时间和更低的温度下。