不同活化劑效應對表面鋁化處理以提升Inconel-617鎳基超合金在950℃乾空氣的抗氧化能力研究

Effect of Different Activators on Aluminizing Treatment to Enhance the Oxidation Resistance of Inconel 617 Nickel-Based Superalloy in Dry Air at 950℃

本研究探討以NH_4Cl及AlF_3為活化劑於700及900℃滲鋁4小時對Inconel-617鎳基超合金施以表面鋁化改質處理，並了解合金在改質前後於950℃乾空氣的氧化差異。研究結果顯示，利用NH_4Cl及AlF_3活化滲鋁處理後，可於Inconel-617表面形成一層Al_3Ni_2滲鋁層，其中又以AlF_3為活化劑的滲鋁效果較佳，整體而言，改質合金在乾空氣中皆能生成α-Al_2O_3層，進而使其比Inconel-617原材的氧化速率明顯降低一到兩個數量級。

This study investigated the surface aluminizing of nickel-based Inconel 617 superalloy using NH_4Cl and AlF_3 as activators at 700℃ and 900℃ for 4 h. The effects of these treatments on the high-temperature oxidation behaviour of the alloy at 950℃ in dry air were examined. The results showed that both activators successfully facilitated the formation of an Al_3Ni_2 aluminide layer on the alloy surface, with AlF_3 demonstrating a more effective aluminizing performance. A protective α-Al_2O_3 scale was observed in all alloys aluminized, leading to a significant reduction in oxidation rate by one to two orders of magnitude, compared to the untreated Inconel 617.