| 简介 |
Permanent and soft magnets that do not depend on rare-earth elements have suitable magnetic properties for electric motor and generator applications. Both saturation magnetization and magneto-crystalline anisotropy of a manganese-bismuth (Mn—Bi) permanent (hard) magnet are increased by alloying the Mn—Bi magnet with cobalt (Co) or cobalt-iron (Co—Fe). Such magnets do not include rare-earth and precious metals (e.g., platinum), which are expensive and often limited in supply, but offer high magneto-crystalline anisotropy and magnetization. Therefore, a relatively high maximum energy product (BH)max is achieved. |
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