Effect of REs (Y, Nd) addition on high temperature oxidation kinetics, oxide layer characteristic and activation energy of AZ80 alloy
作者： Chunlong Cheng , Xiaoqiang Li , Qichi Le , Ruizhen Guo , Qing Lan
DOI: 10.1016/J.JMA.2019.09.013
关键词: Oxide 、 X-ray photoelectron spectroscopy 、 Alloy 、 Analytical chemistry 、 Differential scanning calorimetry 、 Microscope 、 Arrhenius equation 、 Materials science 、 Activation energy 、 Scanning electron microscope
摘要: Abstract The oxidation behaviors of AZ80, AZ80-0.32 Y and AZ80–0.38 Nd (wt.%) alloys were researched at 413 °C, 420 °C, 427 °C 433 °C for up to 6 h in air environment via a high precision analytical balance, laser confocal microscope, differential scanning calorimeter (DSC) analysis, X-ray diffraction (XRD) electron microscope (SEM) observation, photoelectron spectroscopy (XPS) analysis. results show that the weight gain rate AZ80 are reduced significantly, initiation form propagation cracks oxide layer changed. Compact protective forms on alloy surface with or addition. And activation energies AZ80-0.32Y AZ80-0.38Nd calculated Arrhenius equation 82.556 kJ/mol, 177.148 kJ/mol 136.738 kJ/mol, respectively.
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