Effect of heat treatment on phase and structural transformation in SmCo5 alloy powder

Bogatin, Ya. G.; Povolotskii, E. G.

doi:10.1007/bf00792105

Cited by 2 publications

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“…DSC measurements of the milled products, Figure 2, show the exothermic plateau of stress relaxation at temperatures below 400 • C. The recrystallization signal typical of pure iron, in the range between 400 and 500 • C, is convoluted with the recrystallization of SmCo 5 at 500 • C [35]. The exothermic peak between 620 and 650 • C can be attributed the phase transition from SmCo 5 + Fe → Sm 2 (Co 1−x Fe x ) 17 + SmCo 5 , [17,36].…”

Section: Resultsmentioning

confidence: 99%

Magnetic Properties of SmCo5 + 10 wt% Fe Exchange-Coupled Nanocomposites Produced from Recycled SmCo5

et al. 2020

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Nanostructured alloy powders of SmCo5 + 10 wt% Fe obtained using recycled material were studied for the first time. The SmCo5 precursor was obtained from commercial magnets recycled by hydrogen decrepitation. The results were compared with identically processed samples obtained using virgin SmCo5 raw material. The samples were synthesized by dry high-energy ball-milling and subsequent heat treatment. Robust soft/hard exchange coupling was observed—with large coercivity, which is essential for commercial permanent magnets. The obtained energy products for the recycled material fall between 80% and 95% of those obtained when using virgin SmCo5, depending on milling and annealing times. These results further offer viability of recycling and sustainability in production. These powders and processes are therefore candidates for the next generation of specialized and nanostructured exchange-coupled bulk industrial magnets.

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Section: Resultsmentioning

confidence: 99%