Investigations of Phase Growth in the Copper-Tin System

摘要

Cu specimens were coated electrolytically with 20m Sn and subsequently heat treated at T = 473 K for either 500 or 1000 hours. This paper deals with the growth process of the intermetallic compounds Cu_3Sn (ε phase) and Cu_6Sn_5 (η phase) analysed by glow discharge optical emission spectrometry (GD-OES) and by metallography. The results obtained from both methods are in good agreement. During the heat treatment, the Sn layers and the η phase became porous and thus, the calculated layer thicknesses, upon assuming a density equal to that of the compact solids, are different from the measured values.