期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 8, 期 4, 页码 1281-1295出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2019.09.013
关键词
Magnesium; Rare-earth; Oxidation kinetics; Activation energy
资金
- National Key Research and Development Program of China [2016YFB0301104]
- Nation Natural Science Foundation of China [51771043]
- Foundation of State Key Laboratory of Baiyunobo Rare Earth researches and Comprehensive Utilization
- Programme of Introducing Talents of Discipline Innovation to Universities 2.0 (the 111 Project 2.0 of China) [BP0719037]
The oxidation behaviors of AZ80, AZ80-0.32 Y and AZ80-0.38 Nd (wt.%) alloys were researched at 413 degrees C, 420 degrees C, 427 degrees C and 433 degrees C for up to 6h in air environment via a high precision analytical balance, a laser confocal microscope, differential scanning calorimeter (DSC) analysis, X-ray diffraction (XRD) analysis, scanning electron microscope (SEM) observation, and X-ray photoelectron spectroscopy (XPS) analysis. The results show that the weight gain and oxidation rate of AZ80 are reduced significantly, the initiation form and propagation of cracks in oxide layer are changed. Compact and protective oxide layer forms on alloy surface with Y or Nd addition. And the activation energies of AZ80, AZ80-0.32Y and AZ80-0.38Nd alloys calculated via Arrhenius equation are 82.556kJimol, 177.148kJ/mol and 136.738 kJ/mol, respectively. (C) 2020 Published by Elsevier B.V. on behalf of Chongqing University.
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