Electrochemical Phase Formation of Metals and Alloys at Chemically Identical Solid or Liquid Cathode: Part 2. Alloys in the Form of Substitutional Solid Solutions

Abstract

The existence of the phenomenon of electrochemical phase formation in metals and alloys via a supercooled liquid state stage has been discussed. In the second part of the research, the results of the precision X-ray phase analysis for the interface between electrodepositing alloy in the form of a substitutional solid solution and a cathode of Wood’s alloy that persisted in either a solid or a liquid condition are considered. It was found that the phenomenon under study here is proved by the following experimental data: (1) the formation of intermetallics between solid metallic cathode elements and the solvent in the alloy electrodepositing as substitution solid solution, and enhancement of these processes accompanied by the development of additional intermetallics enriched in cathode elements on replacing a solid cathode with a chemically identical liquid one; (2) with alloys electrodepositing as substitution solid solution at a solid metallic cathode, the formation of intermetallics including cathode elements and the alloy solute element building no distinct phase; and (3) on replacing a solid cathode with a chemically identical liquid one, enhanced intermetallic formation involving metallic cathode elements and the electrodepositing alloy solute building no distinct phase plus emergence of additional intermetallics enriched in cathode elements.