X-ray diffraction reinvestigation of the Ni-Pt phase diagram

The Ni-Pt phase diagram was corrected in the range of 15-85 at.% Pt and in the temperature range of 400-525 degrees C using powder X-ray diffraction data. To reduce the time required to achieve the equilibrium state, Ni-Pt alloys, consisting of 80-140 nm nanocrystalline particles (nanoalloys) were used as initial samples. The nanoalloys were synthesized by thermolysis of specially prepared multicomponent precursors. Phase transformations in the system at high temperatures were studied in situ by X-ray diffraction. The boundary positions of Ni1-xPtx (A1), Ni3Pt (L1(2)), NiPt (L1(0)), NiPt3 (L1(2)) single-phase regions were corrected. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The Ni-Pt phase diagram was corrected using powder X-ray diffraction data in the range of 15-85 at.% Pt and in the temperature range of 400-525 degrees C. Nanocrystalline particles (nanoalloys) were used as initial samples to reduce the time required to reach equilibrium, and in situ phase transformations at high temperatures were studied by X-ray diffraction. The positions of single-phase regions in the Ni1-xPtx (A1), Ni3Pt (L1(2)), NiPt (L1(0)), NiPt3 (L1(2)) systems were corrected.