Abstract
The equilibrium diagram of the Pb-Bi system has been studied by means of thermal (inverserate cooling method) and X-ray analyses, electrical resistance measurement and microscopic examination. By the present investigation it was found that theres exists β solid solution which is formed by a peritectic reaction at 188° and has a hexagonal close packed lattice, besides the primary solid solutions formed by the mutual solubility of the component metals as previous found. The solubility limits of the primary solid solutions differ from those of the previous investi-gations; the solubility of Bi in Pb decreases from 14% at 188° to 13% at 6°, and that of Pb in Bi is about 0.5% at 125° (eutectic temp.) and it is almost same down to 6°.
