Effect of residual oxides in Co powder on properties and structure of sintered powder materials in Fe-Co system

Magnetic, electrical, and mechanical properties as well as the structure of Fe-Co powder materials are investigated. It is found that the structural rearrangement from the BCC solid solution of Co in α-Fe (α phase) to the HCP solid solution of Fe in α-Co (ɛ phase) takes place with the increase in Co content. There are nonequilibrium mixtures of these phases in areas of intermediate composition containing residual oxides present in the initial Co powder.