Hydrogen processing research

Hydrogen can be used as a processing tool, to modify the microstructure of a range of functional materials.

hydorgen processing

For example, in Nd-Fe-B magnet alloys, a series of hydrogen - vacuum heat treatments can be applied to a cast alloy to give a powder with a 100x reduction in grain size and partial grain alignment, that is therefore magnetically coercive.

This is called the Hydrogen Disproportionation Desorption Recombination (HDDR) process.

We are working with the Magnetic Materials Group to try to understand the mechanisms involved in the HDDR process, and to apply the process to other types of material.