ABSTRACT The oxidation behavior of NbTi matrix composite reinforced by ZrB2 particles at 800°C-1200°C were investigated. The oxidation kinetic curves of five specimens with different ZrB2 contents (0–60 wt. %) were obtained, and the phase and morphology of oxidized specimens were analyzed by XRD, SEM and EDS. The result showed that both temperature and ZrB2 content have great influence on oxidation resistance of the NbTi-matrix composites. The main oxide was TiNb2O7 when ZrB2 content was 15% and 30%. As the ZrB2 content increased, Nb2Zr6O17 was the predominant oxide. At 800°C and 1000°C, oxide rate reduced due to the formation of Nb2Zr6O17. When temperature reached 1200°C, the volatilization of B2O3 caused many cracks and holes and weakened the protective effect of Nb2Zr6O17.

中文翻译：

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ZrB2颗粒增强NbTi基复合材料的高温氧化特性研究

摘要 研究了 ZrB2 颗粒增强的 NbTi 基复合材料在 800°C-1200°C 下的氧化行为。获得了五个不同 ZrB2 含量（0-60 wt.%）试样的氧化动力学曲线，并通过 XRD、SEM 和 EDS 分析了氧化试样的物相和形貌。结果表明，温度和ZrB2含量对NbTi基复合材料的抗氧化性有很大影响。当ZrB2含量为15%和30%时，主要氧化物为TiNb2O7。随着 ZrB2 含量的增加，Nb2Zr6O17 是主要的氧化物。在 800°C 和 1000°C 时，由于 Nb2Zr6O17 的形成，氧化率降低。当温度达到 1200°C 时，B2O3 的挥发造成许多裂纹和孔洞，削弱了 Nb2Zr6O17 的保护作用。