Zr-Cr-Cu三元系700℃等温截面

Isothermal Section of Zr-Cr-Cu Ternary System at 700℃

摘要:

利用X射线粉末衍射法（XRD），扫描电子显微镜（SEM）和能谱分析（EDX）等方法首次测定了Zr-Cr-Cu三元系700℃等温截面。研究结果表明，此截面由10个单相区、18个两相区和9个三相区组成。第三组元Cr的加入，导致高温CuZr相共析分解温度下降，在700℃时形成稳定的三元相τ。研究确定体系中富锆角和富铜角不存在三元化合物。富锆区合金由ZrCr2、(α-Zr)和 CuZr2三相构成。富铜区合金由(Cr)、(Cu)和Cu5Zr相构成。

Abstract:

The isothermal section of the Zr-Cr-Cu ternary system at 700 ℃ was investigated by using X-ray diffraction, scanning electron microscope and energy dispersive analysis. It was composed of 10 single-phase regions, 18 two-phase regions and 9 three-phase regions. The τ phase was observed to occur as a stable ternary phase at 700 ℃ when Cr was introduced. No ternary compound was observed in the Zr-rich corner and Cu-rich corner. The alloys in Zr-rich corner was consists of ZrCr2, (α-Zr) and CuZr2, while those in the Cu-rich corner was consists of (Cr), (Cu) and Cu5Zr.