Amorphous hard magnetic alloy, amorphous hard magnetic cast alloy, and method for producing the same
First Claim
1. An amorphous hard magnetic alloy having the following general formula:
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space="preserve" listing-type="equation">A.sub.x --(Fe.sub.1-a Co.sub.a).sub.y --D.sub.zwherein A represents at least one element selected from the group consisting of Nd, Sm, Pr and Pm;
D represents at least one element selected from the group consisting of Al, Ga, and Ge;
suffixes x, y, and z satisfy 50≦
x≦
75, 10≦
y≦
45, and 5≦
z≦
15 atomic percent, and suffix a satisfies 5≦
a≦
0.5.
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Abstract
It is an object of the present invention to provide an amorphous hard magnetic alloy which can be produced by a casting method having a low cooling rate and has a large thickness not achieved by conventional liquid quenching methods, an amorphous hard magnetic casting alloy and a method for producing the amorphous hard magnetic cast alloy.
An amorphous hard magnetic alloy in accordance with the present invention has the following general formula:
A.sub.x --(Fe.sub.1-a Co.sub.a).sub.y --D.sub.z
wherein A represents at least one element selected from the group consisting of Nd, Sm, Pr and Pm; D represents at least one element selected from the group consisting of Al, Ga, and Ge; suffixes x, y, and z satisfy 50≦x≦75, 10≦y≦45, and 5≦z≦15 atomic percent, and suffix a satisfies 0≦a≦0.5.
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Citations
12 Claims
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1. An amorphous hard magnetic alloy having the following general formula:
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space="preserve" listing-type="equation">A.sub.x --(Fe.sub.1-a Co.sub.a).sub.y --D.sub.zwherein A represents at least one element selected from the group consisting of Nd, Sm, Pr and Pm;
D represents at least one element selected from the group consisting of Al, Ga, and Ge;
suffixes x, y, and z satisfy 50≦
x≦
75, 10≦
y≦
45, and 5≦
z≦
15 atomic percent, and suffix a satisfies 5≦
a≦
0.5. - View Dependent Claims (2, 3, 4)
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5. An amorphous hard magnetic casting alloy comprising a composition of the following general formula:
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space="preserve" listing-type="equation">A.sub.x --(Fe.sub.1-a Co.sub.a).sub.y --D.sub.zwherein A represents at least one element selected from the group consisting of Nd, Sm, Pr and Pm;
D represents at least one element selected from the group consisting of Al, Ga, and Ge;
suffixes x, y, and z satisfy 50≦
x≦
75, 10≦
y≦
45, and 5≦
z≦
15 atomic percent, and suffix a satisfies 0≦
a≦
0.5. - View Dependent Claims (6, 7, 8)
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9. A method for producing an amorphous hard magnetic casting alloy comprising:
- casting a melt of an amorphous hard magnetic alloy comprising a composition of the following formula into a mold followed by cooling;
space="preserve" listing-type="equation">A.sub.x --(Fe.sub.1-a Co.sub.a).sub.y --D.sub.zwherein A represents at least one element selected from the group consisting of Nd, Sm, Pr, and Pm;
D represents at least one element selected from the group consisting of Al, Ga, and Ge;
suffixes x, y, and z satisfy 50≦
x≦
75, 10≦
y≦
45, and 5≦
z≦
15, and suffix a satisfies 0≦
a≦
0.5 atomic percent. - View Dependent Claims (10, 11, 12)
- casting a melt of an amorphous hard magnetic alloy comprising a composition of the following formula into a mold followed by cooling;
Specification