Rare earth permanent magnet and method for making same
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United States of America Patent
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Oct 16, 2001
Grant Date -
N/A
app pub date -
Feb 1, 1999
filing date -
Feb 1, 1999
priority date (Note) -
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Abstract
A rare earth permanent magnet alloy having a composition expressed as R.sub.x F.sub.100-(x+y+z+m+n) B.sub.y T.sub.z M.sub.m D.sub.n. In this formula, R is one or more of rare earthy elements, such as neodymium, lanthanum, cerium, dysprosium and/or praseodymium; F is Fe or Fe and up to 20 atomic percent of Co by substitution; B is boron; T is one or more elements selected from the group of Ti, Zr, Cr, Mn, Hf, Nb, V, Mo, W and Ta; M is one or more elements selected from the group of Si, Al, Ge, Ga, Cu, Ag, and Au; and D is one or more elements selected from the group of C, N, P, and O. In this formula, x, y, z, m, n are atomic percentages in the ranges of 3
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