急求！！中文摘要翻译成英文的~！~！~！

摘 要:采用包埋渗法在Cr-50Nb合金表面制备单渗Si涂层，研究经不同包埋渗温度（950℃～1250℃）和时间（1h、2h、5h）制备的涂层对Cr-50Nb合金在1100℃和1200℃空气中循环氧化的影响。结果表明，在1250℃X2h下包埋渗Si涂层的试样抗氧化性最好，这些试样的氧化曲线基本符合抛物线规律。SEM和XRD分析显示，1250℃X2h下包埋渗得到的涂层分三层，每层均存在NbCrSi三元化物,且越往内含Si越少。在1250℃下包埋渗Si 2h后的试样进行了1100℃和1200℃循环氧化，试样表面均形成了具有保护性的氧化膜，较好的保护了基体不被氧化。
　　关键词：Cr-Nb合金；包埋渗；工艺；涂层；抗氧化性

　　Abstract: The seepage law embedded in the Cr-50Nb alloy surface preparation of Si single-permeability coating to study the infiltration by the embedding of different temperature (950 ℃ ~ 1250 ℃) and time (1h, 2h, 5h) Preparation of the coating on the Cr - 50Nb alloy at 1100 ℃ and 1200 ℃ in air oxidation cycle. The results showed that under the 1250 ℃ X2h embedded permeability of the sample Si coating the best antioxidant, the oxidation of these samples consistent with the parabolic curve of the basic law. SEM and XRD analysis showed that, 1250 ℃ X2h dialysis be embedded under the coating at three NbCrSi on each floor there are three compounds, and more to co