In the Institute of Metal Physics, hot deformation methods were used to produce permanent magnets, with the properties approaching those of the magnets sintered from Nd-Fe-B alloys. The methods allow the laborious processes of powder metallurgy to be avoided, such as powder synthesis, compaction, and sintering.

Deformability of the Pr-Fe-B-Cu alloys is explained by the presence of a praseodymium-enriched intercrystalline eutectic with the melting temperature of approximately 450^оC. The liquid phase reacts with and sticks to the shell during deformation. A method has been proposed (RF Patent No. 2061562) to eliminate sticking and facilitate the removal of the shell after rolling. The ECAP method (RF Patent No. 2303644) allows producing magnets approximately 100 mm long with diametral or radial texture.