Bismanol is an alloy of Bismuth, Manganese and Iron developed by the US Naval Ordnance Laboratory. An alloy is a Solid solution or Homogeneous mixture of two or more elements, at least one of which is a Metal, which itself has Bismuth (ˈbɪzməθ is a Chemical element that has the symbol Bi and Atomic number 83 Manganese (ˈmæŋgəniːz is a Chemical element, designated by the symbol Mn. Iron (ˈаɪɚn is a Chemical element with the symbol Fe (ferrum and Atomic number 26 The Naval Ordnance Laboratory (NOL, now disestablished formerly located in White Oak Maryland was the site of considerable work that had practical impact upon world technology It was used to make permanent magnets for use in small electric motors. A magnet (from Greek grc μαγνήτης λίθος " Magnesian stone" is a material or object that produces a Magnetic field.
Bismanol magnets have been replaced by Neodymium magnets which are both cheaper and superior in other ways, Samarium-Cobalt magnets in more critical applications, and Alnico magnets. A neodymium magnet or NIB magnet (a variety of Rare-earth magnet) is a powerful Magnet made of a combination of Neodymium, Iron, and Samarium-cobalt magnets are primarily composed of Samarium and Cobalt. Alnico is an acronym referring to alloys which are composed primarily of Aluminium (symbol Al) Nickel (symbol Ni) and Cobalt (symbol
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 pretty good for small electric motors.
Currently Bismuth isn't for magnetic alloys.
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