The Al–Ca System, Part 1: Experimental Investigation of Phase Equilibria and Crystal Structures

The binary aluminum-calcium phase equilibria were investigated using X-ray diffraction methods, metallography, energy-dispersive X-ray and differential thermal analyses, and the diffusion couple technique. The complete phase diagram has been determined. Two new binary compounds AlCa and Al3Ca8were found in addition to the established Al4Ca and Al2Ca phases. The crystal structure of Al3Ca8compound was determined by X-ray powder diffraction methods.