Microstructures and magnetic properties of Nd-Fe-B-X (X = Co, Zr) alloys produced by a metallic mold casting method

Citation
S. Ozawa et al., Microstructures and magnetic properties of Nd-Fe-B-X (X = Co, Zr) alloys produced by a metallic mold casting method, MATER TRANS, 42(9), 2001, pp. 1893-1896
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
MATERIALS TRANSACTIONS
ISSN journal
1345-9678 → ACNP
Volume
42
Issue
9
Year of publication
2001
Pages
1893 - 1896
Database
ISI
SICI code
1345-9678(200109)42:9<1893:MAMPON>2.0.ZU;2-G
Abstract
The microstructures and magnetic properties of Nd4Fe77.5B18.5 and Nd-4(Fe-X )(77.5)B-18.5 (X = Co, Zr) alloys produced by a metallic mold casting were investigated. The resulting Nd4Fe77.5B18.5 alloys had a cylindrical shape w ith 1 mm in diameter and 50 min in length and had fine equiaxed g-rains. Th e cylindrical sample contained some metastable Fe3B and amorphous phases to gether with the stable Fe2B, Nd2Fe14B, and alpha -Fe phases. However, the c oercivity of the cylindrical sample was as low as that of the original ingo t. The substitution of Co or Zr for Fe in Nd4Fe77.5B18.5 alloy resulted in a drastic change in the microstructures. These cylindrical samples showed a slightly higher coercivity than the Nd4Fe77.5B18.5 counterparts.