PHYSICAL AND MECHANICAL-PROPERTIES OF SINTERED ND-FE-B TYPE PERMANENT-MAGNETS

Effective application of the Nd-Fe-B type permanent magnets in electro technical products, instruments, aviation and space devices demands kn owledge of their proper service parameters. In this connection, a comp rehensive study of a wide spectrum of sintered Nd-Fe-B type permanent magnets with various additions of rare earth (RE) and 3-d metals (14 c ompositions, including so-called commercial and laboratory permanent m agnets) was carried out. The mechanical (elastic and strength properti es) and physical (magnetic and thermal properties, and electrical resi stivity) properties of the studied magnets are tabulated, and the data are discussed. The results obtained allow selection of the optimal pe rmanent magnet composition, depending on required properties and the a pplication. Moreover, the results obtained for various permanent magne ts are discussed, taking into account the influence of the factors whi ch are sensitive or insensitive to structure and/or composition change s of the magnets. (C) 1996 Elsevier Science Limited.