There is some interest in FeN magnets and their potential commercialisation by Niron: https://www.nironmagnetics.com/news/
They've been researching this for some time now and it appears the material is notoriously difficult to manufacture. The best source of info on methods that I could find is (later in the article):
https://hackaday.com/2022/09/01/iron-nitrides-powerful-magnets-without-the-rare-earth-elements/
Maybe there are improved methods but what's described there sounds very difficult to scale up.
In the meantime Niron have announced plenty of research and partnerships but not a single magnet produced or supplied to a potential partner/customer.
But we should all be cognisant of new tech that could potentially challenge NdFeB. I follow their releases.
There is some interest in FeN magnets and their potential...
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