Permanent-magnet alloy

Claim 2

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-v-y Fe.sub.u Mn.sub.v X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Cu, Al or mixtures thereof, and

Claim 3

084≦u<0.15 0.02<v<0.15 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resultant briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 4

084≦u<0.15 0.02<v<0.15 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resultant briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 5

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-v-y Fe.sub.u Mn.sub.v X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof, and

Claim 6

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-v-y Fe.sub.u Mn.sub.v X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof, and

Claim 7

084≦u<0.15 0.02<v<0.15 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 8

084≦u<0.15 0.02<v<0.15 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 9

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-x-y Fe.sub.u V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and 0.084≦u<0.15 0.02<x<0.10 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resulting briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 10

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-x-y Fe.sub.u V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and 0.084≦u<0.15 0.02<x<0.10 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resulting briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 11

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-x-y Fe.sub.u V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and 0.84≦u<0.15 0.02<x<0.10 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 12

A permanent magnet monophase alloy selected from the group consisting of RE(Co.sub.1-u-x-y Fe.sub.u V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and 0.84≦u<0.15 0.02<x<0.10 0.05<y<0.20 7.2<z≦8.5 which has been prepared by the process which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 13

A process for preparing a permanent magnet alloy having the general formula: RE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and ______________________________________ 0.05 < u < 0.15 0.084 ≦ u < 0.15 0.003 ≦ v < 0.15 ; 0.02 < v < 0.15 ; 0.003 ≦ w < 0.10 0 = w 0.003 ≦ x < 0.10 0 = x 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 0.084 ≦ u < 0.15 0.05 < u < 0.15 0 = v 0.02 < v < 0.15 0.2 < x < 0.10 or 0.02 < w < 0.10 0 = w 0.02 < x < 0.10 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 ______________________________________ which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resultant briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 14

A process for preparing a permanent magnet alloy having the general formula: RE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof and ______________________________________ 0.05 < u < 0.15 0.084 ≦ u < 0.15 0.003 ≦ v < 0.15 ; 0.02 < v < 0.15 ; 0.003 ≦ w < 0.10 0 = w 0.003 ≦ x < 0.10 0 = x 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 0.084 ≦ u < 0.15 0.05 < u < 0.15 0 = v 0.02 < v < 0.15 0.2 < x < 0.10 or 0.02 < w < 0.10 0 = w 0.02 < x < 0.10 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 ______________________________________ which comprises homogenization heat-treating the alloy of the molten and cast starting materials at a temperature just above the solidus temperature or in the temperature range in which the non-RE and non-Co components of the alloy have their maximum solubility in the RE 2 Co 17 mixed crystals; crushing and grinding the alloy to a particle size of from 2 μm to 10 μm; magnetically aligning the resultant powder; isostatically compressing the resultant powder; sintering the resultant briquette just below the solidus temperature; and finally annealing the sintered briquette at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 15

A process for preparing a permanent magnet alloy having the general formula: RE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof, and ______________________________________ 0.05 < u < 0.15 0.084 ≦ u < 0.15 0.003 ≦ v < 0.15 ; 0.02 < v < 0.15 ; 0.003 ≦ w < 0.10 0 = w 0.003 ≦ x < 0.10 0 = x 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 0.084 ≦ u < 0.15 0.05 < u < 0.15 0 = v 0.02 < v < 0.15 0.2 < x < 0.10 or 0.02 < w < 0.10 0 = w 0.02 < x < 0.10 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 ______________________________________ which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.

Claim 16

A process for preparing a permanent magnet alloy having the general formula: RE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.z wherein RE is samarium, cerium, cerium mischmetal (MM), praseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixtures thereof, and ______________________________________ 0.05 < u < 0.15 0.084 ≦ u < 0.15 0.003 ≦ v < 0.15 ; 0.02 < v < 0.15 ; 0.003 ≦ w < 0.10 0 = w 0.003 ≦ x < 0.10 0 = x 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 0.084 ≦ u < 0.15 0.05 < u < 0.15 0 = v 0.02 < v < 0.15 0.2 < x < 0.10 or 0.02 < w < 0.10 0 = w 0.02 < x < 0.10 0.05 < y < 0.20 0.05 < y < 0.20 7.2 < z ≦ 8.5 7.2 < z ≦ 8.5 ______________________________________ which comprises casting the alloy of the molten starting materials in a physical shape as similar as possible to that desired for the end product; solidifying the cast alloy by directed crystallization; homogenizing it at a temperature just below the solidus temperature; and finally annealing the cast alloy at a temperature between 700° C. and 900° C. to produce a monophase crystal.