Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1594728 | Solid State Communications | 2008 | 5 Pages |
Abstract
The effect of C addition on the magnetic properties, phase evolution, and microstructure of Hf-containing SmCo7−xHfx (x=0.1–0.3x=0.1–0.3) ribbons via a melt spinning technique under sufficient supercooling conditions has been investigated. A small amount of C addition not only effectively refines the grain size from 100–400 nm for C-free to 20–60 nm for C addition, but also brings extremely fine high-magnetization fcc-Co grains (5–10 nm), and it eventually enhances the exchange coupling effect between grains. As a result, magnetic properties are enhanced markedly. When the C content exceeds 0.12, the larger amount of 2:17 phase and nonmagnetic Sm2C3 phase appear and, consequently, the permanent magnetic property of the ribbons is degraded.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
H.W. Chang, S.T. Huang, C.W. Chang, W.C. Chang, A.C. Sun, Y.D. Yao,