Nanocomposite magnet and method for producing same

Details Nanocomposite magnet and method for producing same Nanocomposite magnet and method for producing same

2005-05-10

2005-05-10

Sheehan, John P. (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S102000, C164S462000, C164S474000, C164S475000, C164S479000, C164S488000, C164S489000

Reexamination Certificate

active

06890392

ABSTRACT:
A method of making a material alloy for an iron-based rare earth magnet includes the step of forming a melt of an alloy with a composition of (Fe1-mTm)100-x-y-z-n(B1-pCp)xRyTi2Mn. T is Co and/or Ni; R is at least one element selected from Y (yttrium) and the rare earth elements; and M is at least one element selected from Al, Si, V, Cr, Mn, Ni, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb, wherein the following inequalities are satisfied: 10<x≦25 at %, *6≦y<10 at %, 0.5≦z≦12 at %, 0≦m≦0.5, 0≦n≦10 at % and 0≦p≦0.25. Next, the melt is fed onto a shoot with a guide surface tilted at about 1 degree to about 80 degrees with respect to a horizontal plane, thereby moving the melt onto a melt/roller contact region. The melt is then rapidly cooled using a chill roller to make a rapidly solidified alloy including an R2Fe14B phase.

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