鎳基超合金René-80、Inconel-792、Incoenl-617和Haynes-230之高溫氧化行為

High-temperature Oxidation of René-80、Inconel-792 Inconel-617, and Haynes-230 in Dry Air

本研究探討René-80 （以下簡稱R-80）、Inconel-792 （In-792）、Inconel-617 （In-617）和Haynes-230 （H-230）四種鎳基超合金於800 ~ 1000℃空氣中之氧化行為。研究結果顯示，四種鎳基超合金之氧化動力學皆遵守拋物線型定律，且氧化速率皆隨著溫度的升高而加快。四種超合金氧化後生成之氧化物因合金成分不同而有差異，其中，R-80生成氧化鉻（Cr2O3）、氧化鎳鉻（NiCr2O4）與氧化鈦（TiO2），In-792生成氧化鎳（NiO）、氧化鈦（TiO2）、氧化鉻（Cr2O3）與氧化鎳鉻（NiCr2O4）。In-617與H-230則是生成氧化鉻（Cr2O3）與氧化鎳鉻（NiCr2O4）。此外，更發現到R-80、In-792與In-617皆有氧化鋁（Al2O3）之內氧化粒子生成，且內氧化粒子的粒徑大小隨鋁含量和溫度之增加而增大。

The high-temperature oxidation of commercial nickel-base superalloys containing René-80 (R-80), Inconel-792 (In-792), Inconel-617 (In-617), and Haynes-230 (H-230) has been studied over the temperature range 800 ~ 1000℃ in dry air. The results indicated that the oxidation kinetics of all the alloys followed the parabolic rate law, and the oxidation rate constants increased with increasing temperature. The oxide scales formed in dry air were strongly dependent on alloy-composition, consisting of Cr2O3 and TiO2 for R-80, of NiO, Cr2O3, NiCr2O4, and TiO2 for In-792, of Cr2O3 and NiCr2O4 for both In-617 and H-230. The internal-oxide particles of Al2O3 were found in R-80, In-792, and In-617, and their size also increased with increasing Al content and temperature.