Rare-earth transition-metal alloys exhibit strong magnetic properties in comparison to other hard magnetic materials such as hard ferrite and alnico. Increasing demand in miniaturization of magnetic components such as micro electromechanical systems (MEMS) devices and magnetic recording media has lead to studies involving fabrication of magnetic films/coatings. Neodymium iron boron (NdFeB) was deposited by means of atmospheric plasma spraying (APS) onto stainless steel substrates using amorphous feedstock powder. The microstructure and microhardness of the coatings were studied. The coatings have an average thickness of 150 μm, with a maximum porosity of 5.5% and Vickers hardness of 674 HV.
Frontier of Applied Plasma Technology: Proceedings of the 4th International Workshop on Plasma Application and Hybrid Functionally Materials, Melbourne, Australia, 11-13 March 2011, Vol. 4, no. 2 (Mar 2011), pp. 115-116