Inconel 617合金在850~1050℃之高溫氧化行為

High-Temperature Oxidation of Inconel 617 at 850 ~ 1050 ℃

本研究主要探討Inconel 617（以下簡稱In-617）合金在850 ~ 1050℃空氣下之高溫氧化行為。研究結果顯示，In-617合金在所有溫度下的氧化動力學皆遵守拋物線律，且氧化速率隨溫度上升而增快。整體而言，In-617合金經高溫氧化後形成兩層氧化物，外層主要為Cr2O3與NiCr2O4，而在內層的氧化物為單層的Cr2O3，此外，在基材近氧化層處有內氧化的Al2O3顆粒生成，其含量隨溫度上升而增多。

High temperature oxidation behavior of superalloy Inconel 617 (In-617) was studied over the temperature range of 850 ~ 1050 ℃ in dry air. The results showed that the oxidation kinetics followed a parabolic-rate law, and the oxidation rates increased steadily with temperature. In general, duplex scales formed on the alloy consisted mostly of Cr2O3 and NiCr2O4 in the outer layer, and of a single Cr2O3 layer in the inner layer. In addition, the internal oxidation of Al2O3 precipitates was observed at the substrate beneath the scales, of which the amount increased with increasing temperature.