英语翻译摘 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

　　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 contain less Si.In 1250 ℃ under the embedded Si 2h dialysis sample after a 1100 ℃ and 1200 ℃ cyclic oxidation,the specimen surface formed a protective oxide film,the better protection of the substrate is not oxidized.
　　Key words:Cr-Nb alloy; embedded dialysis; technology; coating; antioxidant