Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE = Y+Dy+Nd, M = Zr+TiC)
| Title | Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE = Y+Dy+Nd, M = Zr+TiC) |
| Publication Type | Journal Article |
| Year of Publication | 2007 |
| Authors | Tang W, Wu YQ, Dennis KW, Kramer MJ, Anderson IE, McCallum RW |
| Journal Title | Journal of Applied Physics |
| Volume | 101 |
| Pages | 09K510 |
| Date Published | May |
| Type of Article | Proceedings Paper |
| ISBN Number | 0021-8979 |
| Accession Number | ISI:000246567900378 |
| Keywords | single-crystals |
| Abstract | An MRE2(Fe,Co)(14)B alloy with Zr substitution and TiC addition was systematically studied. It was found by means of X-ray diffraction, transmission electron microscopy (TEM) and magnetic measurements that the combination of Zr substitution and TiC addition yields adequate microstructural control in both gas atomization (GA) and melt spinning (MS) techniques. For MS ribbons, an H-cj of 11.7 kOe and (BH)(max) of 11.9 MGOe at 27 degrees C were obtained in the ribbons spun at 16 m/s and annealed at 700 degrees C for 15 min. For GA powders, an H-cj of 9.1 kOe and (BH)(max) of 9.2 MGOe at 27 degrees C were obtained in 20-25 mu m GA powder annealed at 700 degrees C for 15 min. The temperature coefficients of B-r and H-cj are 0.06 and 0.36%/degrees C for the MS ribbon and 0.09 and 0.4%/degrees C for the GA powder in the temperature range of 27-100 degrees C, respectively. TEM images revealed that the MS ribbon consists of a fine and uniform microstructure with an average size of 30 nm, while the GA spherical powder consists of an interior coarsened microstructure with a grain size of 80 nm and a rim area with a grain size of 10 nm. (c) 2007 American Institute of Physics. |
| DOI | 10.1063/1.2710551 |
| Alternate Journal | J. Appl. Phys. |
