Phase relationships in the Gd–Co–Al ternary system at 500°C

Abstract

The phase relationships in the Gd–Co–Al ternary system at 500°C have been investigated mainly by X-ray diffraction, scanning electron microscopy, and energy dispersion spectroscopy. The existence of two ternary compounds GdCo_0.74Al_1.26 and Gd₂Co₂Al has been confirmed. Twenty-two single-phase regions (including solid solution regions of the binary compounds), 43 two-phase regions, and 22 three-phase regions were found to exist at this isothermal section. In this work, no new binary or ternary phase was found.

Keywords:

• Gd–Co–Al ternary system
• phase diagram
• X-ray diffraction
• SEM observation

Acknowledgement

This work was supported by the National Nature Science Foundation of China (Grant No. 50261002, 50661002).