A volatility diagram of zirconium carbide (ZrC) at 1600, 1930, and 2200°C was calculated in this work. Combining it with the existing volatility diagrams of ZrB₂ and SiC, the volatility diagram of a ternary ZrB₂‐SiC‐ZrC (ZSZ) system was constructed in order to interpret the oxidation behavior of ZSZ ceramics. Applying this diagram, the formation of ZrC‐corroded and SiC‐depleted layers and the oxidation sequence of each component in ZSZ during oxidation and ablation could be well understood. Most of the predictions from the diagrams are consistent with the experimental observations on the oxidation scale of dense ZrB₂‐SiC‐ZrC ceramics/coatings after oxidation at 1600°C or ablation at 1930 and 2200°C. The reasons for the discrepancy are also briefly discussed.

中文翻译：

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ZrB2-SiC-ZrC系统的挥发性图和实验验证

在这项工作中，计算出了碳化锆（ZrC）在1600、1930和2200°C的挥发性图。结合现有的ZrB ₂和SiC挥发性图，构建了三元ZrB ₂ -SiC-ZrC（ZSZ）系统的挥发性图，以解释ZSZ陶瓷的氧化行为。应用该图，可以很好地理解ZrC腐蚀层和SiC耗尽层的形成以及ZSZ中每种成分在氧化和烧蚀过程中的氧化顺序。图中的大多数预测与致密ZrB ₂－SiC－ZrC陶瓷/涂层在1600°C氧化或在1930和2200°C烧蚀后的氧化规模的实验观察结果一致。还简要讨论了差异的原因。