The redistribution of Pt after heat treatment (290C, 1h) was analyzed by using large-angle atom probe tomography, assisted by femtosecond laser pulses. Two silicides, Ni2Si and NiSi, were found; together with the solid solution of Ni and Pt. The redistribution of Pt at the Ni1-xPtx/Ni2Si interface was a clear illustration of the snow-plow effect. Segregation of Pt at the Ni2Si/NiSi interface was observed, and was attributed to interfacial segregation.

Snowplow Effect and Reactive Diffusion in the Pt Doped Ni–Si System. O.Cojocaru-Mirédin, D.Mangelinck, K.Hoummada, E.Cadel, D.Blavette, B.Deconihout, C.Perrin-Pellegrino: Scripta Materialia, 2007, 57[5], 373-6