Processing of immiscible metallic alloys by rheomixing process

摘要: Abstract Mixing immiscible alloys has been a long standing challenge to both materials scientists and processing engineers. Despite great efforts made worldwide, including extensive space experiments, no casting techniques so far can produce the desirable fine uniform dispersed microstructure. Based on experience in mixing organic liquids offered by polymer community, authors have successfully developed rheomixing process for alloys. The utilises first intensive shear stress-strain field twin screw extruder create homogeneous liquid dispersion within miscibility gap then viscous force semisolid slurry at temperature below monotectic is used counterbalance gravitational Marangoni effect. A laboratory scale rheomixer designed constructed realise this two step strategy. Ga–Pb Zn–Pb systems were selected ...