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Microstructural evaluation of oxide layers in CaO-added Mg alloys
- Authors
- Lee, Taeg-Woo; Kim, Hyung-Giun; So, Myoung-Gi; Lee, Jin-Kyu; Kim, Shae K.; Park, Woo-Jin; Kim, Won-Yong; Kim, Sangshik; Lim, Sung-Hwan
- Issue Date
- 25-Jun-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Metals and alloys; Surfaces and interfaces; Oxidation; Microstructure; Transmission electron microscopy; TEM
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.635, pp 5 - 10
- Pages
- 6
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 635
- Start Page
- 5
- End Page
- 10
- ISSN
- 0925-8388
1873-4669
- Abstract
- A transmission electron microscopy analysis was conducted on the oxide layers of Mg-5.5Al-0.25Mn (AM60) alloys with different levels of CaO content formed in a thermogravimetric analyzer (TGA) system at 450 degrees C for 7 h. It was found that the oxide layer in AM60 + CaO grew as a columnar structure and, resultantly, that the oxide layers had different thicknesses with different levels of CaO content. The columnar oxide grains that were formed on the Mg + CaO alloy grew on the [100](MgO), resulting in a more compact and thicker initial oxide layer compared to the normal oxide layer. The columnar growth of the oxide layer in AM60 + CaO formed due to the Ca, which dissolved from CaO. (C) 2015 Elsevier B.V. All rights reserved.
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