| Texto completo | |
| Autor(es): |
Perigo, E. A.
[1]
;
da Silva, S. C.
[2]
;
Martin, R. V.
[1]
;
Takiishi, H.
[2]
;
Landgraf, F. J. G.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Inst Technol Res, BR-05508901 Sao Paulo - Brazil
[2] Nucl & Energy Res Inst, BR-05508000 Sao Paulo - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 111, n. 7 APR 1 2012. |
| Citações Web of Science: | 25 |
| Resumo | |
The effects of the hydrogenation-disproportionation-desorption-recombination (HDDR) processing conditions on the microstructure and magnetic properties of NdFeB powders prepared from recycling sintered N42 grade magnets were evaluated. Temperatures below 840 degrees C and above 900 degrees C are deleterious to HDDR powders' properties. The hydrogen pressure, ranging from 60 to 135 kPa, has a major influence on the remanence compared to that on the intrinsic coercivity. The best magnetic properties (J(r) = 0.58 T and H-mu 0(c) = 15 T) were obtained with T-recomb = 860 degrees C, P-H2 = 135 kPa, and t(recomb) = 330 s. Such coercivity value corresponds to 93% of the starting material, not achieved yet by optimizing the HDDR process and without using Dy. (C) 2012 American Institute of Physics. {[}doi: 10.1063/1.3677761] (AU) | |
| Processo FAPESP: | 10/08018-8 - Reprocessamento de ímãs sinterizados comerciais de TRFeB para a preparação de magnetos aglomerados e de compostos magnéticos semiduros utilizando hidrogênio |
| Beneficiário: | Élio Alberto Périgo |
| Linha de fomento: | Bolsas no Brasil - Pós-Doutorado |