Cr-Ni二元相图

Phase Diagram of Cr-Ni Binary System

利用X射线衍射、电子探针微分析、扫描电子显微镜和差热分析测定了Cr-Ni合金样品和扩散偶Cr-Ni样品,构筑了Cr-Ni二元体系的相图.在此相图中存在σ、γ和α相,这些相的结构分别属于A2,A1和D8b型结构.它们的晶胞参数分别随着温度的增加和Cr含量的增加而增大.温度变化对晶胞参数的影响强于Cr含量变化对晶胞参数的影响.δ相仅存在于未退火的熔炼样品中和差热分析后的样品中.该相属于不稳定相.

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 σ, γandαphases exist in Cr Ni binary phase diagram. The structures of the σ, γand αphases 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 δphase is only confirmed in the alloys after DTA and cast alloys by X ray diffraction.δphase belongs to metastable phase.