Study on Selective Hydrogen Decrepitation of NdFeB Alloys

The selective hydrogen decrepitation of NdFeB alloys was studied. It is found that in the course of hydrogen absorption of NdFeB alloys, if the amount of hydrogen absorbed by Nd-rich phases is theoretically calculated in advance and the quantities of NdFeB alloys placed in the container are quantitatively controlled, good selective hydrogen decrepitation can be completely realized under the conditions of low environmental temperature and hydrogen pressure.