How Extrinsic Is the Coercivity in NdFeB Bonded Magnets?

Autor(es)

Perigo, E. A. ^{[1, 2]} ; Cruz, I. A. ^[1] ; Antunes, B. ^[1] ; Braga, A. P. V. ^{[3, 1]} ; Landgraf, F. J. G. ^{[3, 1]}

Afiliação do(s) autor(es)

^[1] Inst Technol Res, BR-05508901 Sao Paulo - Brazil

^[2] Univ Luxembourg, Lab Phys Adv Mat, L-1511 Luxembourg - Luxembourg

^[3] Univ Sao Paulo, Polytech Sch, BR-05508010 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE Transactions on Magnetics; v. 49, n. 9, p. 5043-5047, SEP 2013.
• Citações Web of Science: 3

Resumo

The influence of the densification step, performed by uniaxial pressing at room temperature, on the coercivity mu H-0(c) of NdFeB bonded magnets has been analyzed. The mass density does not play any role on mu H-0(c) of non-cured magnets prepared by the mentioned method. Due to the brittle and intergranular character of the Nd2Fe14B-based phase fracture, the nano-sized grains are not affected or the modification is negligible, which maintains mu H-0(c) unchanged. After curing, the intrinsic coercivity of the magnets is reduced as a function of the compaction pressure increase. (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
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado