High temperature oxidation of rare earth permanent magnets. Part 1 – Microstructure evolution and general mechanism
| Autor: | Kathie McGregor, W. John Rankin, Muhamad Firdaus, M. Akbar Rhamdhani, Anita M. D’Angelo, M. I. Pownceby, Nathan A. S. Webster |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering 02 engineering and technology General Chemistry Electron microprobe 021001 nanoscience & nanotechnology Microstructure Redox Isothermal process 020501 mining & metallurgy Characterization (materials science) Corrosion 0205 materials engineering Chemical engineering Phase (matter) Magnet General Materials Science 0210 nano-technology |
| Zdroj: | Corrosion Science. 133:374-385 |
| ISSN: | 0010-938X |
| Popis: | The microstructure evolution and mechanism of oxidation of (Nd,Pr)FeB magnet in the range 700–1500 K have been investigated. Bulk (10 × 5 × 5 mm) and powder samples (−150 μm) were oxidized under isothermal and non-isothermal conditions. DSC, XRD, high-temperature XRD, SEM and EPMA characterization techniques were utilized to investigate the general oxidation reactions, microstructure evolutions and phase transformations. Three different microstructure evolutions were observed in the temperature ranges 700–1000 K, 1000–1300 K and 1300–1500 K. The different product microstructures formed during the oxidation have implications for devising strategies for the recycling/recovery process of (Nd,Pr)FeB magnets. |
| Databáze: | OpenAIRE |
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