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Iron-nitride is a powerful magnetic material, being theoretically more than twice as strong as rare earth magnets. Built from two of the most common elements on Earth iron and nitrogen, these magnets are also much cheaper than rare earth magnets. These advantages give iron nitride magnets a potent niche, as they are both more effective and cheaper than traditional solutions.
Company Niron Magnetics has begun building partnerships to commercialize their iron-nitride magnets for REE-reliant applications like power generation, electric vehicles, and other key technologies. They have secured over $17.5 million dollars from the U.S. Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) program, where this funding will go towards scaling partner capabilities, production lines, and other aspects necessary for the deployment of REE-free super magnets. Niron Magnetics partners include several global device manufacturers such as Volvo, Western Digital, and others to ensure that this magnet technology seamlessly integrates into customer products as scale-up continues.
For the purpose of magnetic REPULSION maybe using the Meissner effect of SUPERCONDUCTORS could have better results than neodymium magnets... Superconductors would repeal the magnetic field of air core coils when the coils are turned "on", right? Superdiamagnetism...
What you think?
Still not sure if that would work the same way as with permanent magnets, but let's keep an eye on it, specially with the recent news about room temperature superconductors
This thread opened and slept before I was here....but I saw it today. Somewhere in the dusty cobwebs of my mind, be it HS honors physics or actual college physics courses, I fuzzily recall some formula or rule of thumb that defines the maximum field strength from naturally occurring elements.
however, powered magnets...it is within our grasp to now contain a matter/anti-matter annihilation in the engine room of a starship....should any of that ever exist.
I'm still tracking the iron nitride permanent magnets saga...
News from this year on MIT Technology Review:
Quote:
How new magnets could accelerate climate action
(...)
Permanent magnets can maintain a magnetic field on their own without an electric charge. They’re commonly used in motors, making them spin when an electric field is applied. The permanent magnets used in high-end motors today are built using a class of materials called rare earth metals. Demand for these materials is expected to skyrocket in the coming decades, fueled in particular by the growth of electric vehicles and wind turbines. As mines and processing facilities struggle to keep up, supplies may stretch thin.
One Minnesota startup has been working to address this looming shortage. Niron Magnetics is building a large-scale manufacturing facility to produce iron nitride, a magnetic material derived from common elements, while also working to improve the material’s properties so that it can be used in stronger magnets to power more products.
(...)
With higher magnet strength, iron nitride magnets will be more useful in devices like electric vehicles and wind turbines. In theory, the material should be able to reach 20 to 30 MGOe using Niron’s current manufacturing method, Wang says, though achieving that will require “a lot of optimization.” The theoretical ceiling is much higher, with iron nitride potentially being able to form magnets stronger than the neodymium ones used today.
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