Internal oxidation of Sm(CobalFe0.22Cu0.08Zr0.02)7.5 alloy at 700°C
Source abstract
Abstract
Abstract The internal oxidation zone (IOZ) of a Sm(CobalFe0.22Cu0.08Zr0.02)7.5 alloy formed in air at 700 °C was characterized using transmission electron microscopy (TEM). It shows that the internal oxides are varied in composition and size with depth, from mainly fine FeSmO3 in shallow area to larger Sm2O3 in deeper area. The internal oxidation also causes the formation of a thin phase transformation zone between the IOZ and the alloy. The internal oxidation mechanism, together with the oxidation-induced phase transformation of the magnetic matrix phases of the alloy, is fully disclosed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Magnetic properties of thin films · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. High-performance permanent magnets10.1007/s001140050755 ↗
2. Recent developments in high-temperature permanent magnet materials
3. Application of high temperature magnetic materials10.1109/20.908805 ↗
4. Surface reaction and Sm depletion at 550C for high temperature Sm–TM magnets10.1109/20.951225 ↗
5. Thermal stability of Sm–TM high temperature magnets at 300–550°C10.1109/20.908773 ↗
6. The oxidation of SmCo magnets10.1063/1.2830559 ↗
7. The mechanism of high temperature oxidation of a SmCo-based magnetic alloy10.1016/j.corsci.2012.04.028 ↗
8. The oxidation morphology of SmCo alloys10.1016/j.jallcom.2009.07.115 ↗
9. The oxidation kinetics of SmCo alloys10.1016/j.jallcom.2008.05.083 ↗
10. Recent progress in 2:17-type permanent magnets10.1007/BF02648616 ↗
11. Micromagnetism and the microstructure of high-temperature permanent magnets10.1063/1.1809250 ↗
12. Indentification of the cell boundary phase in the isothermally aged commercial Sm(Co0.75Fe0.1Cu0.12Zr0.04)7.4 sintered magnet10.1016/j.scriptamat.2005.12.009 ↗
13. Twinning structure in Sm(Co, Fe, Cu, Zr)z permanent magnet10.1016/j.intermet.2010.02.008 ↗
14. The microstructure of sintered Sm(Co0.72Fe0.20Cu0.055Zr0.025)7.5 permanent magnet studied by atom probe10.1016/j.actamat.2003.10.015 ↗
15. A fundamental aspect of the growth process of alumina scale on a metal with dispersion of CeO2 nanoparticles10.1016/j.corsci.2011.02.014 ↗
16. Phase equilibria in Fe–Cu–X (X: Co, Cr, Si, V) ternary systems10.1361/105497102770331712 ↗
17. Co–Cu–Fe (cobalt–copper–Iron)10.1361/10549710417731 ↗
18. The Fe–Zr (iron–zirconium) system10.1007/BF02881963 ↗
19. Experimental determination and thermodynamic assessment of the phase diagram in the Co–Zr system10.1016/j.jallcom.2009.04.032 ↗
20. Co–Fe–Zr (cobalt–iron–zirconium)10.1361/105497103770330820 ↗
21. Redetermination of the phase equilibria in the system Sm–Co–Cu for Sm content 0–20at.% at 850C10.1016/0022-5088(89)90216-6 ↗
22. Barin · 1995
23. Uber die innere oxydation von metallegierungen10.1016/0001-6160(64)90036-7 ↗
24. The Co–Fe (cobalt–iron) system10.1007/BF02868548 ↗
25. CVM calculation of the ternary system Co–Cu–Fe10.1016/S0925-8388(00)01198-1 ↗
26. Genesis of the cell microstructure in the Sm(Co, Fe, Cu, Zr) permanent magnets with 2:17 type10.1002/pssa.2211400104 ↗
27. The (SmZr)Co3 phase in Sm(CoFeCuZr)z magnets10.1109/TMAG.2006.884058 ↗
28. The constitution of copper-hardened samarium–cobalt permanent magnets10.1016/0022-5088(77)90182-5 ↗
29. First principles study of transition-metal substitutions in Sm–Co permanent magnets10.1063/1.1792791 ↗
30. The cobalt–samarium–copper phase diagram