Iron-Nitride-Based Magnets

University of Minnesota
Synthesis and Phase Stabilization of Body Center Tetragonal (BCT) Metastable Fe-N Anisotropic Nanocomposite Magnet- A Path to Fabricate Rare-Earth-Free Magnet
Image of Minnesota's technology
Program: 
ARPA-E Award: 
$4,200,931
Location: 
Minneapolis, MN
Project Term: 
01/01/2012 to 03/31/2015
Project Status: 
ACTIVE
Critical Need: 
Rare earths are naturally occurring minerals with unique magnetic properties that are used in electric vehicle (EV) motors and wind generators. Because these minerals are expensive and in limited supply, alternative technologies must be developed to replace rare-earth-based magnets in motors and generators. Alternatives to rare earths will contribute to the cost-effectiveness of EVs and wind generators, facilitating their widespread use and drastically reducing the amount of greenhouse gases released into the atmosphere.
Project Innovation + Advantages: 
The University of Minnesota is developing an early stage prototype of an iron-nitride permanent magnet material for EVs and renewable power generators. This new material, comprised entirely of low-cost and abundant resources, has the potential to demonstrate the highest energy potential of any magnet to date. This project will provide the basis for an entirely new class of rare-earth-free magnets capable of generating power without costly and scarce rare earth materials. The ultimate goal of this project is to demonstrate a prototype with magnetic properties exceeding state-of-the-art commercial magnets.
Impact Summary: 
If successful, the University of Minnesota's project would demonstrate improved performance in permanent magnets without using rare earths--facilitating the greater use and lower cost of renewable power and EVs.
Security: 
The U.S. produces a small fraction globally of industrial rare earths. Developing alternatives to the use of rare earths has the potential to reduce our dependence on these materials and will have a positive impact on our national economic and energy security.
Environment: 
The transportation and electric power sectors account for nearly 75% of U.S. greenhouse gas emissions each year. Better magnets would support the widespread use of EVs and wind power, significantly reducing these emissions.
Economy: 
The U.S. spends nearly $1 billion per day on imported petroleum. Improvements in magnet technology would enable a broader use of EVs, which would help insulate our economy from unexpected spikes in the price of oil.
Contacts
ARPA-E Program Director: 
Dr. Ping Liu
Project Contact: 
Prof. Jianping Wang
Partners
Oak Ridge National Laboratory