抄録
In order to understand the role of Ni in enhancing the sintering of Fe–Ni powder compacts, the grain boundary diffusion coefficient of 63Ni in γ-Fe is determined in the temperature range from 1153 to 1287°C by the residual-activity counting method using the instantaneous source model proposed by Suzuoka.
The results are expressed as follows:
Volume diffusion: D=1.09×10−4·exp(−296.7kJ·mol−1⁄RT)m2⁄s
Grain boundary diffusion: D′=24.1×10−4·exp(−176.2kJ·mol−1⁄RT)m2⁄s.
