Download citation on researchgate investigation of as cast iron light rare earth boron alloys for permanent magnets the magnetic and structural properties of fe r b magnets were studied in the . Permanent magnet materials based on the rare earth iron boron tetragonal compounds formance permanent magnets lre and fe however form few stable intermetallics and none of these has a conventional attempts to magnetically harden the rare earth iron alloys were carried out by forming amorphous. Permanent magnet alloys of a light rare earth element such as neodymium with iron or iron and boron are known for use in the production of permanent magnets with these permanent magnet alloys to achieve coercive force values adequate for permanent magnet production it is necessary to use special processing techniques. Neodymium iron boron magnets ndfeb are the strongest permanent magnet materials with small size light weight and high energy product china rare earth magnet limited customizes ndfeb magnets in different shapes and sizes grades include n35n52 n30mn50m n30hn48h n30shn45sh n28uhn40uh n28ehn38eh and n28ahn35ah coatings include ni cu ni zinc grey epoxy black epoxy ni au ni . Dynamic mechanical analysis of magnetic rare earth iron boron alloys of nd fe b permanent magnets has been studied using ultrasonic resonance a sharp decrease in elastic moduli at about 600c was observed and attributed to the appearance of a liquid phase at the grain boundaries relief of residual stresses in rare earth alloys
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