Fracture Strength and Surface Magnetic Flux Uniformity in an Isotropic Polymer-Bonded Ring-Shaped Nd-Fe-B Magnet

FARZAM MEHR, Navid, Sahand BEHRANGI, Milad AHMADI a Abbas KIANVASH. Fracture Strength and Surface Magnetic Flux Uniformity in an Isotropic Polymer-Bonded Ring-Shaped Nd-Fe-B Magnet. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE. NEW YORK: SPRINGER, 2018, roč. 27, č. 8, s. 3972-3977. ISSN 1059-9495. Dostupné z: https://dx.doi.org/10.1007/s11665-018-3494-4.

Základní údaje

• Originální název: Fracture Strength and Surface Magnetic Flux Uniformity in an Isotropic Polymer-Bonded Ring-Shaped Nd-Fe-B Magnet
• Autoři: FARZAM MEHR, Navid, Sahand BEHRANGI, Milad AHMADI a Abbas KIANVASH.
• Vydání: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, NEW YORK, SPRINGER, 2018, 1059-9495.

Další údaje

• Originální jazyk: angličtina
• Typ výsledku: Článek v odborném periodiku
• Utajení: není předmětem státního či obchodního tajemství
• Impakt faktor: Impact factor: 1.476
• Doi: http://dx.doi.org/10.1007/s11665-018-3494-4
• UT WoS: 000440433900018
• Klíčová slova anglicky: magnetic properties; Nd-Fe-B; polymer-bonded ring-shaped magnets; surface magnetic flux uniformity; tensile fracture strength
• Štítky: RIV ne

Anotace

Ring-shaped (RS) polymer-bonded magnets were produced from a mixture of an isotropic nanocrystalline Nd-Fe-B powder with a nominal composition of 59.8 wt.% Fe, 29 wt.% Nd, 5 wt.% Zr, 4.8 wt.% Co and 1.4 wt.% B and a variety of epoxy resins as binders, using a compaction-molding technique. The morphology and average particle size of the powders are determined by an SEM. The magnetic properties of the magnets were measured using a permeameter. Magnetic flux on the surface of the magnets was determined by a Gauss meter. The mechanical properties of the RS specimens were determined using a tensile fracture strength (FS) test. The effects of polymer type and amount, hardener amount, applied pressing pressure and curing temperature and time on FS were investigated. The experimental results showed that at optimal conditions of 8 wt.% solid epoxy, 3.5 wt.% solid hardener, a pressing pressure of 900 MPa and a curing time of 8 h at 170 degrees C, a maximum tensile strength of similar to 36 MPa was achieved. Surface magnetic flux uniformity in optimal mechanical conditions was also found to be optimum at around +/- 40 G, which is one of the best flux uniformities in bonded magnets.