Claims
- 1. A magnetically anisotropic hot-worked magnet made of an R-T-B alloy containing a transition metal T as a main component, a rear earth element R including yttrium, and boron B; said magnet having fine crystal grains having an average grain size of 0.02-1.0 .mu.m, and having a carbon content of from about 0.3 to 0.8 weight % and an oxygen content of from about 0.07 to 0.5 weight %.
- 2. A magnetically anisotropic hot-worked magnet made of an R-T-B alloy containing a transition metal T as a main component, a rare earth element R including yttrium, and boron B; said magnet having fine crystal grains having an average grain size of 0.02-1.0 .mu.m, having a carbon content of from about 0.3 0.8 weight % and an oxygen content of from about 0.07 to 0.5 to weight %, and having a substantially uniform residual strain distribution.
- 3. A magnetically anisotropic hot-worked magnet made of an R-T-B alloy containing a transition metal T as a main component, a rare earth element R including yttrium, and boron B, said magnet having fine crystal grains having an average grain size of 0.02-1.0 .mu.m, the angular variance of orientation of said crystal grains being within 30.degree. from the C axes of said crystal grains when measured by X-ray, and having a carbon content of from about 0.3 to 0.8 weight % and an oxygen content of from about 0.07 to 0.5 weight %.
- 4. The magnetic alloy anisotropic hot-worked magnet according to claim 3, wherein difference between the maximum and minimum values of angular variance of orientation is 10.degree. or less.
- 5. The magnetically anisotropic hot-worked magnet as in claim 1 produced by a process including the step of mixing with said alloy, a liquid additive composed of at least one organic compound having a boiling point of 50.degree. C. or higher, and hot-working the mixture to provide said magnetic anisotropy.
- 6. The magnetically anisotropic hot-worked magnet as in claim 2 produced by a process including the step of mixing with said alloy, a liquid additive composed of at least one organic compound having a boiling point of 50.degree. C. or higher, and hot-working the mixture to provide said magnetic anisotropy.
- 7. The magnetically anisotropic hot-worked magnet as in claim 3 produced by a process including the step of mixing with said alloy, a liquid additive composed of at least one organic compound having a boiling point of 50.degree. C. or higher, and hot-working the mixture to provide said magnetic anisotropy.
- 8. The magnetically anisotropic hot-worked magnet as in claim 3 wherein the angular variance is measured at the surface of the magnet.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-247172 |
Sep 1988 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 07/327,631, filed Mar. 23, 1989, now U.S. Pat. No. 4,978,398
Foreign Referenced Citations (3)
Number |
Date |
Country |
0133758 |
Mar 1985 |
EPX |
0174735 |
Mar 1986 |
EPX |
0306928 |
Mar 1989 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
327631 |
Mar 1989 |
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