Patent Number: 6,332,933

Title: Iron-rare earth-boron-refractory metal magnetic nanocomposites

Abstract: Magnetic nanocomposite materials including iron, rare earth elements, boron, refractory metal and, optionally, cobalt are disclosed. Neodymium and lanthanum are preferred rare earth elements. The amounts of Nd, La, B and refractory metal are controlled in order to produce both hard and soft magnetic phases, as well as a refractory metal boride precipitated phase. The refractory metal boride precipitates serve as grain refiners and substantially improve the magnetic properties of the nanocomposite materials. The materials are particularly suitable for making bonded magnets.

Inventors: Ma; Bao-Min (Robbinsville, NJ), Bounds; Charles O. (Yardley, PA), Chang; Wen Cheng (Chia-Yi, TW), Chen; Qun (Princeton, NJ)

Assignee: Santoku Corporation

International Classification: C22C 38/00 (20060101); H01F 1/057 (20060101); H01F 1/032 (20060101); H01F 001/057 ()

Expiration Date: 12/25/2018