“Order-Order” Kinetics In Ni50.5Al49.5 single crystal by quasi-residual resistometry

► Very slow “order-order” kinetics in NiAl in view of high vacancy concentration. ► Activation energy for ordering/disordering lower than for Ni self-diffusion in NiAl. ► Poor disordering efficiency of atomic jumps in NiAl due to triple defect formation.