A nanocomposite magnet has a composition represented by (Fe1-mTm)100-x-y-z-nQxRyTi zMn, where T is at least one of Co and Ni, Q is at least one of B and C, R is at least one rare earth element that always includes at least one of Nd and Pr and optionally includes Dy and/or Tb, and M is at least one
A nanocomposite magnet has a composition represented by (Fe1-mTm)100-x-y-z-nQxRyTi zMn, where T is at least one of Co and Ni, Q is at least one of B and C, R is at least one rare earth element that always includes at least one of Nd and Pr and optionally includes Dy and/or Tb, and M is at least one element selected from the group consisting of Al, Si, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb. The mole fractions x, y, z, m and n satisfy 10 at %
대표청구항▼
The invention claimed is: 1. A nanocomposite magnet having a composition represented by the general formula: (Fe1-mTm)100-x-y-z-nQxRyTi zMn, where T is at least one element selected from the group consisting of Co and Ni; Q is at least one element selected from the group consisting of B and C; R is
The invention claimed is: 1. A nanocomposite magnet having a composition represented by the general formula: (Fe1-mTm)100-x-y-z-nQxRyTi zMn, where T is at least one element selected from the group consisting of Co and Ni; Q is at least one element selected from the group consisting of B and C; R is at least one rare earth element that always includes at least one of Nd and Pr and optionally includes Dy and/or Tb, wherein R includes La only in an amount due to inevitable impurities; and M is at least one element selected from the group consisting of Al, Si, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb, the mole fractions x, y, z, m and n satisfying the inequalities of: 10 at %2Fe14B phase and a soft magnetic phase, wherein the volume percentage of the hard magnetic phase is 60 vol. % or more, and the soft magnetic phase is distributed on the grain boundaries of the hard magnetic phase; and exhibits hard magnetic properties including a remanence Br of at least about 0.7 T and a coercivity HcJ of at least about 480 kA/m. 2. The nanocomposite magnet of claim 1, wherein the hard magnetic phase has an average grain size of about 5 nm to about 200 nm; and the soft magnetic phase has an average grain size of about 1 nm to about 50 nm. 3. The nanocomposite magnet of claim 1, wherein the nanocomposite magnet has an oxygen content of at most about 700 ppm by mass. 4. The nanocomposite magnet of claim 1, wherein the nanocomposite magnet exhibits hard magnetic properties including a remanence Br of at least about 0.8 T and a coercivity HcJ of at least about 550 kA/m.
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