Adhesion Upon Solidification and Detachment in the Melt Spinning of Metals

摘要: In planar-flow melt spinning, liquid metal is rapidly solidified, against a heat-sink wheel, into thin ribbons which adhere to the substrate wheel. absence of blade mechanically scrape ribbon off it may wrap fully around and re-enter solidification region, called ‘catastrophic’ adhesion. Otherwise, detachment occurs part way ‘natural’ detachment. Natural through release thermo-elastic stress after sufficient cooling ribbon, according prior studies. This note extends work by invoking crack propagation view natural which, when combined with simple model build-up cooling, yields an adhesion/detachment criterion characterized interfacial adhesion/fracture energy $$\gamma $$ . For aluminum-silicon alloys frozen copper substrate, we report \approx\,$$ 60 N/m. The can be used predict once heat-transfer coefficient known. We obtain this parameter from experiments then use catastrophic adhesion in semi-empirical way. Our puts quantitative foundation underneath qualitative discussions literature. Alternatively, demonstrates how strength adhesion, property only pair adhering materials, might measured based on sticking distance experiments.