This study focused on the objective to reveal the effect of Si element on the oxidation behaviors of (Ti₅Si₃ + TiC)/Ti6Al4V composites. The oxidation testing at 700 °C and 800 °C for 100 h, respectively, indicated that the oxidation resistance of (Ti₅Si₃ + TiC)/Ti6Al4V composites were improved obviously. The two aspects contributed to the improvement: 1) the oxide scale was densified owing to that the SiO₂ sealed the voids among TiO₂ scale; 2) with the densification, the oxide scale of composites bonded well with the substrate. The oxidation behaviors of composites were hardly affected by TiC particles.

中文翻译：

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硅元素对提高混合（Ti ₅ Si ₃ + TiC）颗粒增强的Ti6Al4V基复合材料抗氧化性能的影响

这项研究的目标是揭示硅元素对（Ti ₅ Si ₃ + TiC）/ Ti6Al4V复合材料的氧化行为的影响。分别在700°C和800°C下进行100 h的氧化测试，表明（Ti ₅ Si ₃ + TiC）/ Ti6Al4V复合材料的抗氧化性得到了明显改善。这两个方面有助于改进：1）由于SiO ₂密封了TiO ₂氧化皮中的空隙，致使氧化皮致密。2）随着致密化，复合材料的氧化皮与基底良好地结合。TiC颗粒几乎不影响复合材料的氧化行为。