Effect of Fe on hydrogenation and dehydrogenation of Sm(Co bal Fe x Cu 0.053 Zr 0.02 ) 7.84 (x=0.2,0.3,0.4,0.5) alloys

Hydrogen decrepitation as a highly efficient and excellent crushing method is widely used in the preparation of NdFeB magnets[1]. However, this method still exist many difficulties in the industrial preparation for 2:17 type SmCo alloys owing to high hydrogen pressure. Our previous work[2] has reported 2:17 type SmCo alloys occur HD at room temperature and hydrogen pressure of 0.3 MPa and has shown that Fe atom improved hydrogenation decrepitation ability of alloys by improving hydrogen-absorbing ability of 1:7 phase. But the mechanism that Fe improve hydrogen-absorbing ability of the 1:7 phase still need further study. In addition, subsequent degassing behaviour of alloys have been studied by using DSC.