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　　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

Adopt a bag to bury the alloy law oozing Si coating oozing in Cr-50Nb alloy surface preparation Shan , studying by that the different parcel buries the coating temperature (950 ~C ~ 1250 ~C) sums time (1 h , 2 hs , 5 hs) preparation oozing to Cr-50Nb in 1100 ~C and 1200 ~C air middle circulation oxidize effect. The sample antioxidation sex indicating result , burying package under 1250 ~C X2h to Si coating ooze is best , these the sample oxide curves accord with parabola law basically. SEM and XRD analyse display , bury package under 1250 ~C X2h coating oozing being allotted three tiers, equal existence of each tier NbCrSi San Yuan melts a thing , the paster , the fewer contain Si internally and. Bury the sample the Si 2 hs queens oozing package under 1250 ~C having carried out 1100 ~C and 1200 ~C circulation oxide, the sample has formed the oxide film having protection sex outside equally, fairly good protection base the body is not oxidized.

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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

By embedding infiltration law in 50Nb alloy surface preparation Cr - single permeability, to study the different Si coating embedding permeability temperature (950 degrees c ~ 1,250 degrees Celsius) and time (5h), 1h, 2h preparation for Cr - 50Nb alloy coatings in 1,100 degrees and 1200 ° air circulation oxidation. Results show that under the X2h degrees in 1250 embedding ooze coating specimen Si oxidation resistance, these sample oxidation curve accords with parabola basic rules. By XRD, SEM and analysis shows that under the embedding X2h 1,250 degrees of ooze coating three layers, each layer NbCrSi are formed, and the ternary contains Si less. In 125 ° c embedding permeability of samples after the 2h Si the 1,100 degrees c and 12, sample surface oxidation cycle has formed a protective oxide film, good protection was not oxidation.
Keywords: Cr - Nb alloy, Embedding permeability, Technology, Coating, Oxidation resistance