Preparation of monotectic alloys having a controlled microstructure by directional solidification under dopant-induced interface breakdown

摘要: Monotectic alloys having aligned spherical particles or rods of the minor component dispersed in a matrix major are prepared by forming melt containing predetermined amounts and components chosen monotectic system, providing dopant capable breaking down liquid-solid interface for alloy, directionally solidifying at selected temperature gradient rate movement (growth rate). Shaping into spheres spacing therebetween controlled amount growth values. Specific alloy systems include Al-Bi,Al-Pb Zn-Bi, using transition element such as iron.