The use of hydrogen as a processing gas to produce rare earth magnets

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Hydrogen is used in the conventional production of sintered (rare earth) neodymium-iron-boron magnets and in the recycling of these materials. The University of Birmingham has led international efforts in both of these areas. In recent years the Magnetic Materials Group have been developing new methods to manufacture rare earth magnets based on a process called hydrogen ductilisation. This process involves heating cast alloys in hydrogen to modify the microstructure. The material which is produced is ductile and can be shaped at room temperature. This reduces the number of process steps, reduces waste and could give a significant economic advantage to magnet manufacture. However the process is far from optimised and the aim of this project will be to develop this process alongside the team in Birmingham.