System Al-Ba

Abstract

Alloys from 85 to 100% Ba are studied principally by thermal analysis and microscopic examination, while only a limited amount of work was done to outline 60 to 80% Ba alloy region. The results obtained are as follows: (1) The maximum solubility of Al in Ba is 1.1% at the eutectic temperature 528°. (2) An eutectic exists at 92.9% Ba and 528° between Ba and Al₄Ba. (3) An intermetallic compound Al₄Ba melts at 1097°. (4) The diagram up to 30% Ba is found in good agreement with previous works. (5) The crystal of Al₄Ba is investigated by Laue method and its C axis is found to be perpendicular to the cleavage of the crystal.