Abstract: The microstructures and rheological features of partially solidified eutectic Sn-Pb alloy were studied shear flows using a concentric cylinder viscometer (Searle-type). It is found that the alloy has its structure of the sphercidal particles which could be composed of three colonies different in the eutectic morphology, and that the slurry flows with the properties of a non-Newtonian fluid.

Key words: Sn-Pb共晶合金, 部分凝固合金, 流变性质, 显微组织