Claims
- 1. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B, wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 3 to 11 and balance Ho, said alloy exhibiting in combination .alpha. less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 2. The alloy of claim 1 wherein R includes up to 10% Gd.
- 3. The alloy of claim 1 wherein R includes up to 15% Tb.
- 4. The alloy of claim 1 wherein R includes up to 10% Dy.
- 5. The alloy of claim 1 wherein R includes up to 18% Er.
- 6. The alloy of claim 1 wherein R includes up to 12% Tm.
- 7. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B, wherein R is a combination of rare earth elements consisitng essentially of, in atomic percent, Nd 3 to 11, at least one optional heavy rare earth element selected from the group consisting of Gd up to 10, Tb up to 15, Dy up to 16, Er up to 18 and Tm up to 12 and balance Ho, said alloy exhibiting in combination .alpha. less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 8. The alloy of claim 1, or claim 2, or claim 3, or claim 4, or claim 5, or claim 6 or claim 7 wherein Ho is 75 to 92%.
- 9. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B, wherein R is a combination of rare elements consisting essentially of, in atomic percent, Nd 4 to 10, Tm 0 to 13 and Ho 83 to 96, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 10. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 5 to 11, Er 0 to 18, Ho 76 to 94, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250 .degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 11. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 7 to 11, Tb 9 to 12 and Ho 78 to 90, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 12. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, atomic percent Nd 7 to 11, Dy 0 to 15 and Ho 75 to 90, said alloy exhibiting in combinatio alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 13. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of a rare earth elements consisting essentially of, in atomic percent, Nd 7 to 11, Gd 0 to 10, and Ho 82 to 92, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 14. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 7 to 11, Gd 0 to 10, and Ho 82 to 92, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 15. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 6 to 10, Dy 0 to 8, Er 0 to 14, Ho 76 to 96, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 16. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 3 to 11, Tm 0 to 12, Er 0 to 18, and Ho 76 to 92, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 17. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 9 to 11, Dy 9 to 15, Tb 0 to 12, and Ho 75 to 88, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
- 18. A permanent magnet alloy consisting essentially of R.sub.2 Fe.sub.14 B wherein R is a combination of rare earth elements consisting essentially of, in atomic percent, Nd 8 to 12, Dy 0 to 15, Gd 0 to 8, and Ho 72 to 88, said alloy exhibiting in combination alpha less than -0.01% per .degree.C. over the temperature range of -50.degree. C. to 250.degree. C. and M.sub.s greater than 7500 Gauss at room temperature.
Parent Case Info
This application is a continuation of application Ser. No. 010,738 , filed February 4, 1987, abandoned.
US Referenced Citations (1)
| Number |
Name |
Date |
Kind |
|
4533408 |
Koon |
Aug 1985 |
|
Foreign Referenced Citations (4)
| Number |
Date |
Country |
| 0101552 |
Feb 1984 |
EPX |
| 0106948 |
May 1984 |
EPX |
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May 1984 |
EPX |
| 0126179 |
Nov 1984 |
EPX |
Continuations (1)
|
Number |
Date |
Country |
| Parent |
10738 |
Feb 1987 |
|
Patent Grant
4902360
