|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Magnetic Anistropy and Microstructure Interplay in Fe16N2 Based Permanent Magnets
||Md A Mehedi, Yanfeng Jiang, Jian-Ping Wang
|On-Site Speaker (Planned)
||Md A Mehedi
Rare-earths are expensive, the extraction process is energy intensive and hazardous for the environment and human health. Fe16N2 is regarded as one of the potential candidates of rare-earth-free, permanent magnets for its high magnetocrytalline anisotropy and high saturation magnetization.The coercivity of a magnet is an extrinsic property of a material, which depends largely on the microstructure.We will present both theoretical calculation and experimental results of microstructure-coercivity relation in Fe16N2. The first principal calculation was done using analytical equations relating coercivity and microstructure. The maximum coercivity from a pure Fe16N2 magnet will be close to 9000 Oe, which can produce a permanent magnet of energy product over 100 MGOe. We will also demonstrate the effect of doping on the magnetic microstructure by using images from scanning electron microscope. The interplay of grain boundary engineering and magnetic behavior will also be demonstrated in the presentation.