DEVELOPMENT OF ANISOTROPIC DIE UPSET MAGNETS WITH HIGH-ENERGY PRODUCT BY SOME ORGANIC MATERIALS

被引：5

作者：

IWASAKI, K

TANIGAWA, S

TOKUNAGA, M

机构：

[1] Magnetic and Electronic Materials Research Laboratory, Hitachi Metals, Ltd., Kunagaya, Saitana

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1990年 / 26卷 / 05期

关键词：

Acids - Organic - Crystals - X-Ray Analysis - Magnetic Materials - Lubricants - Magnetic Properties - Anisotropy - Metal Forming - Upsetting;

D O I：

10.1109/20.104808

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To improve magnetic properties and hot workability of anisotropic Nd-Fe-Co-B-Ga die upset magnets effects of inner lubricants were studied. BN, MOS2 and graphite powder were employed as inner lubricants. Additions of small amount of graphite powder were remarkably effective among 3 types of inorganic agents. By employing liquid lubricants instead of inorganic solid lubricants, further improvement of magnetic properties and hot flowability were achieved. For example, die upset magnets with 0.3 wt% oleic acid showed 4π1r=12.6kG, iHc=15. 7k0e and (BH)max=38.5MG0e. The increase in energy product was 7 MG0e compared with unlubricated magnets. Study of X-ray diffraction revealed that the improvement was caused by better crystal alignment along the compression direction during plastic flow. Also inner lubricants work effectively as grain growth inhibitors in the interface of flakes during hot working. © 1990 IEEE

引用

页码：2592 / 2594

页数：3

共 3 条

[1] DETERMINATION OF THE DEGREE OF CRYSTALLITES ORIENTATION IN PERMANENT-MAGNETS BY X-RAY-SCATTERING AND MAGNETIC MEASUREMENTS [J].