| Project/Area Number |
59850053
|
|---|
| Research Category |
Grant-in-Aid for Developmental Scientific Research
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
電子材料工学
|
|---|
| Research Institution | Miyagi National College of Technology |
|---|
Principal Investigator |
YAGI Masaaki 宮城工業高専, その他, 教授 (80005371)
|
|---|
| Project Period (FY) |
1984 – 1985
|
| Project Status |
Completed (Fiscal Year 1985)
|
| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1985: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1984: ¥2,500,000 (Direct Cost: ¥2,500,000)
|
|---|
| Keywords | Rapidly Quenching / Rare Earth Cobalt Alloys / 磁石薄帯 |
|---|
| Research Abstract |
Sm-Co and Pr-Co ribbons were produced by rapid quenching techniques. The samples were melted and quenched in Ar gas atmosphere in order to avoid oxidation. The continuous ribbons obtained were 20 to 50 <micro> m in thickness, 1 to 3mm in width and above 10m in length. These ribbons were flexible, and it was possible to wind around a rod 8mm in diameter. The coercivities of as-quenched Sm-Co ribbons for Sm content<16.7at%(the stoichiometric content of Sm <Co_5> ) were two times the value of those of sintered Sm-Co binary systems. The effect of Cu addition of the magnetic properties of Sm-Co ribbons was also investigated. An appreciable increase of the coercivities was obsereved by small amout of Cu addition. A maximum coercivity of about 10k0e was obtained for 17.3at% Pr-Co ribbons (approximately the stoichiometric content of Pe <Co_5> ), which was twice the value of sintered Pr <Co_5> magnets. Oxygen content of these ribbons was 300 500ppm (by weight), less than about 1/10 the content of sintered magnets. These 17.3at% Pr-Co ribbons were magnetically and chemically stable under atmospheric conditions for over a year.
|
