Bismanol
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Bismanol is an alloy of Bismuth, Manganese and Iron developed by the US Naval Ordnance Laboratory. It was used to make permanent magnets for use in small electric motors.[1]
Bismanol magnets have been replaced by Neodymium magnets which are both cheaper and superior in other ways, Samarium-Cobalt magnets in more critical applications, and Alnico magnets.
[edit] Bismuth use in permanent magnets and permanent magnet electric motors
Around 50 years ago, maybe more, the US Naval Ordnance Laboratory developed a permanent magnetic alloy called "Bismanol" which is a Bismuth-Manganese-Iron alloy. Bismanol has very high coercive force and moderate energy density, making it a good choice for small electric motors[citation needed].
Currently Bismuth isn't for magnetic alloys.
[edit] References
- ^ Adams, Edmond (1953). "A New Permanent Magnet from Powdered Manganese Bismuthide". Rev. Mod. Phys. 25 (1): 306–307. doi:10.1103/RevModPhys.25.306.
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