Medicust - Health and Medical HTML5 Template. Melting of Pb particles embedded in Cu–Zn matrices ScienceDirect. Jul 24, 1998 Fig. 10(a) shows the X-ray diffractogram of the melt spun sample showing mainly two phases, Pb and f.c.c. solid solution of Cu–Zn.The latter is the matrix phase, the same as that observed for alloy 1.