location: Current position: Home >> Scientific Research >> Paper Publications

Oxidation behavior of a single-crystal Ni-based superalloy over the temperature range of 850 degrees C-950 degrees C in air

Hits:

Indexed by:期刊论文

Date of Publication:2019-08-01

Journal:APPLIED SURFACE SCIENCE

Included Journals:SCIE、EI

Volume:484

Page Number:209-218

ISSN No.:0169-4332

Key Words:Ni-based; Kinetics; Stage; Oxide film; Alumina

Abstract:The oxidation behavior of a single-crystal Ni-based superalloy over the temperature range of 850 degrees C-950 degrees C and under R-a= 0.1-0.2 mu m was investigated. The oxidation kinetics of the superalloy presented two stages. The first and second stages had activation energies of 222 and 263 KJ.mol(-1), respectively. The oxide film comprised NiO, NiCr2O4, CrTaO4, and Al2O3. The formation time of the continuous Al2O3 layer corresponded to the transition point of oxidation kinetics at each temperature. Mass gain in the first stage could be attributed to the formation of an outer NiO layer and an inner alumina layer, whereas that in the second stage could be ascribed to the growth of intermediate spinel layers.

Pre One:304不锈钢点蚀损伤的非线性超声表征

Next One:拉应力对2205双相不锈钢临界点蚀温度和点蚀行为的影响