| 학회 | 한국재료학회 |
| 학술대회 | 2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 | 17권 1호 |
| 발표분야 | B. Nanomaterials and Processing Technology((나노소재기술) |
| 제목 | Deposition of Dy on the Nd-Fe-B particle by using APD |
| 초록 | Nd-Fe-B is raw material of 3rd generation of permanent magnet. Rare earth magnets (Nd2Fe14B) have been widely used various industrial field. because of their excellent magnetic properties(strong magnetic energy, light-weight, etc..). Up to now, however, their undesirable thermal stability is still a major concern in some practical application such as high temperature motor. For the high temperature usage, it is well known that addition of heavy rare earths of Dy or Tb is effective to enhance coercivity and consequent thermal stability of the Nd–Fe–B magnets because Dy or Tb increases the magnetic anisotropy field of the Nd–Fe–B compound. But, Rare earth resources are concentrated in some countries and their resource supplying has been influenced by political situations or economic affairs, so that efficient manufacturing processes for the Nd–Fe–B sintered magnets are strongly demanded from a viewpoint of the resource security. In this study, discuss the experimental results of Dy doped using, so called, arc plasma deposition (APD). It is simple process than thinfilm deposition or diffusion, less change of microstructure and can control uniformly distribution of particles. The experimental condition was undertaken with pulse ratio of 5000, 10000, 20000 and 40000 in vaccum using the Nd-Fe-B powder with size of under 5㎛, and alloy powders exhibited different microstructures depending on the pulse ratio increasing. Various techniques such as Scanning Electron Microscopy (SEM), Transmission Electron Spectroscopy (TEM), Inductively coupled plasma method (ICP) and X-Ray Diffraction (XRD) are used for analyzing the experimental results. |
| 저자 | 나현웅1, 김용환1, 최한신1, 조용수2 |
| 소속 | 1한국생산기술(연), 2연세대 |
| 키워드 | Rare earth magnet; Nd-Fe-B; Dy doping; arc plasma deposition (APD) |
