Abstract A B-modified silicide coating on Nb-Si based alloy was prepared by the method of pack cementation. The oxidation resistance of the B-modified silicide coating was studied in the pest-oxidation temperature range (from 650 °C to 850 °C). Oxidation experiments show that the samples coated with B-modified silicide coating maintain low-rate oxidation and suffer from no pest oxidation at all experimental temperatures. The preferential oxidation of Ti and Si can suppress the formation of Nb2O5. Besides, the borosilicate scale with high fluidity can seal the cracks and pores in the scale. Thus, the occurrence of pest catastrophe is avoided.

中文翻译：

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Nb-Si基合金中B改性硅化物涂层的中温氧化行为

摘要 采用填充渗碳法在Nb-Si基合金上制备了B改性硅化物涂层。在害虫氧化温度范围内（650°C 至 850°C）研究了 B 改性硅化物涂层的抗氧化性。氧化实验表明，涂有B-改性硅化物涂层的样品在所有实验温度下均保持低速率氧化且无害虫氧化。Ti和Si的优先氧化可以抑制Nb2O5的形成。此外，高流动性的硼硅酸盐水垢可以密封水垢中的裂缝和孔隙。从而避免了病虫害的发生。