中文摘要：

艾尔， Al-Si 和 Cr-Al-Si 涂层被粉末包装硬化准备到 IC20 合金上改进合金的氧化抵抗。在 1 100 档猠極獴愠搠晩敦敲瑮猠瑩慵楴湯的涂层和 uncoated IC20 合金的等温的氧化行为 ???? t

英文摘要：

A1, A1-Si and Cr-A1-Si coatings are prepared onto IC20 alloy by powder pack cementation to improve the oxidation resistance of the alloy. The isothermal oxidation behaviors of the coatings and the uncoated IC20 alloy at 1 100 ℃ are comparatively in- vestigated. For the coatings, less weight gains are obtained compared to the uncoated alloy after 100 h thermal exposure. The A1-Si coating exhibits the best oxidation resistance, while the addition of Cr accelerates the scale spallation. Phase transforma- tion from β-NiA1 to y and y＇ occurs in the coating after oxidation for extended periods. The oxidation protection and degradation mechanisms for these coatings are discussed.