Zhongxi Zhu

Experimental investigation and thermodynamic calculation of the Zn―Al―Sb system

Abstract The 873 K isothermal section of the Zn–Al–Sb ternary system was experimentally determined using scanning electron microscopy coupled with wave and energy dispersive X-ray spectroscopy. No ternary compound was found in the present study. Based on the experiment results together with available information in the literature, the phase diagram calculation for Zn–Al–Sb was carried out by means of the CALPHAD technique. A consistent set of thermodynamic parameters for each phase was derived. The optimized results and the experimental data are in good agreement.

Experimental investigation of the Zn-Fe-V system at 450°C

Abstract Phase relations in the Zn – Co – Sb ternary system have been studied experimentally for the whole composition range, using scanning electron microscopy coupled with energy-dispersive spectrometry and X-ray diffraction. The ternary compound named CoZnSb, containing 26.0 to 36.1 at.% Co, 31.1 to 36.5 at.% Zn and 31.8 to 39.7 at.% Sb, still exists at 450 °C. Moreover, the experimental results indicate that twelve tri-phase regions could be confirmed in the system at 450 °C, and the maximum solubility of Zn in CoSb is up to 6.0at.%.

The 600°C and 800°C isothermal sections of the Zn–V–Sb system

Abstract Phase relations in the Zn–V–Sb ternary system have been studied experimentally for the whole composition range for two temperatures, 600°C and 800°C, using scanning electron microscopy coupled with energy-dispersive spectrometry and X-ray diffraction. The ternary compound VZnSb, mentioned in the literature, still exists at 600°C, but disappears at 800°C. Moreover, the experimental results indicate that eight tri-phase regions could be confirmed in the system at 600°C, and four tri-phase regions exist in the 800°C isothermal section. The maximum solubility of Zn in V3Sb2 and V3Sb is up to 14.3 at.% and 3.6 at.% at 600°C, and 6.2 at.% and 2.7 at.% at 800°C, respectively.

Phase equilibria of the Ni–Sb–Zn system at 600 °C

Abstract The phase equilibria of the Ni–Sb–Zn ternary system at 600 °C have been experimentally investigated using X-ray diffraction and scanning electron microscopy coupled with energy/wavelength dispersive X-ray spectroscopy. Four ternary compounds, NiSbZn (τ1), Ni2SbZn2 (τ2), Ni3Sb2Zn (τ3) and Ni4.6SbZn (τ4), were identified and thirteen three-phase regions were confirmed in the present work. Moreover, the maximum solubilities of Zn in NiSb and NiSb2 were determined to be 2.0 and 1.0 at.% at 600 °C, respectively; and those of Sb in β1 and γ were measured up to 11.8 and 5.3 at.%, respectively.