Abstract: Cr-Ni binary system was constructed by the determination of normal alloy samples and diffusion couple samples using XRD, electron probe microanalysis, scanning electron microscopy and differential thermal analysis. In our studies the , γ andα phases exist in Cr-Ni binary phase diagram. The structures of the , γ and α phases belong to A2, A1 and , respectively. The lattice parameters of these phases increase with temperature and with increasing of chromium concentration. The effect of temperature on the change of lattice parameters is more obvious than that of Cr concentration. The δ phase is only confirmed in the alloys after DTA and cast alloys by X-ray diffraction.δ phase belongs to metastable phase.

Key words: Phase diagram of Cr-Ni, Phase structure, XRD