Rapid solidification of Cu–25 wt.% Cr alloys was carried out by melt spinning at three wheel speeds 4, 12 and 36 m/s. The microstructure ofthe ribbons was investigated by scanning electron microscopy (SEM). It was found that the ribbons generally have a microstructure consistingof a fine dispersion of a Cr-rich phase in a Cu-rich matrix, and that the morphology and size of the Cr-rich phase vary with the wheelspeed. For lower wheel speeds, the Cr-rich phase shows dual morphologies, dendrites and spheroids. The Cr-rich dendrites are all distributedaround the Cr-rich spheroids, and have a larger amount on the free surface than on the wheel surface. The Cr-rich spheroids show a widedistribution of size, and have a larger mean size on the free surface than on the wheel surface. In the ribbons of the lowest wheel speed, smallCr-rich spheroids tend to gather around those big ones forming spheroid clusters. For the highest wheel speed, the Cr-rich phase shows onemorphology, spheroids, and a reduced size. The results were discussed with respect to the formation of the Cr-rich spheroids during rapidsolidification.