简介概要

Oxidation Behavior of the Nickel-Based Superalloy DZ125 at 980℃

来源期刊:Acta Metallurgica Sinica2017年第9期

论文作者:Ye-Bing Hu Li Zhang Cong-Qian Cheng Peng-Tao Zhao Guang-Ping Guo Jie Zhao

文章页码:857 - 862

摘    要:The isothermal oxidation behavior of the nickel-based superalloy DZ125 was investigated at 980 °C through SEM/EDX and XRD. The weight loss process exhibited three periods—initial, transient and steady stages, which correspond to the formation of three layers on the surface. The outer layer was composed of Ni O, whereas the intermediate layer mainly consisted of spinels and was accompanied with Ta-rich oxide. Alumina was evident as the inner continuous layer close to the substrate. The first formation of alumina was responsible for the initial stage of weight loss, and the formation of Ni O and intermediate layer may dramatically affect on the transient and steady stage, respectively. The oxide scales effect on growth mechanism was discussed.

详情信息展示

Oxidation Behavior of the Nickel-Based Superalloy DZ125 at 980℃

Ye-Bing Hu1,Li Zhang2,Cong-Qian Cheng1,Peng-Tao Zhao2,Guang-Ping Guo2,Jie Zhao1

1. School of Materials Science and Engineering, Dalian University of Technology2. Beijing Institute of Aeronautical Materials

摘 要:The isothermal oxidation behavior of the nickel-based superalloy DZ125 was investigated at 980 °C through SEM/EDX and XRD. The weight loss process exhibited three periods—initial, transient and steady stages, which correspond to the formation of three layers on the surface. The outer layer was composed of Ni O, whereas the intermediate layer mainly consisted of spinels and was accompanied with Ta-rich oxide. Alumina was evident as the inner continuous layer close to the substrate. The first formation of alumina was responsible for the initial stage of weight loss, and the formation of Ni O and intermediate layer may dramatically affect on the transient and steady stage, respectively. The oxide scales effect on growth mechanism was discussed.

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