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- Title
Adhesion Upon Solidification and Detachment in the Melt Spinning of Metals.
- Authors
Altieri, Anthony; Steen, Paul
- Abstract
In planar-flow melt spinning, liquid metal is rapidly solidified, against a heat-sink wheel, into thin ribbons which adhere to the substrate wheel. In the absence of a blade to mechanically scrape the ribbon off the wheel, it may wrap fully around and re-enter the solidification region, called 'catastrophic' adhesion. Otherwise, detachment occurs part way around the wheel, called 'natural' detachment. Natural detachment occurs through a release of thermo-elastic stress after sufficient cooling of the ribbon, according to prior studies. This note extends prior work by invoking a crack propagation view of natural detachment which, when combined with a simple model of the thermo-elastic stress build-up and ribbon cooling, yields an adhesion/detachment criterion characterized by an interfacial adhesion/fracture energy $$\gamma $$ . For aluminum-silicon alloys frozen against a copper substrate, we report $$\gamma \approx\,$$ 60 N/m. The criterion can be used to predict detachment once a heat-transfer coefficient is known. We obtain this parameter from natural detachment experiments and then use it to predict catastrophic adhesion in a semi-empirical way. Our note puts a quantitative foundation underneath prior qualitative discussions in the literature. Alternatively, it demonstrates how the interfacial strength of adhesion, a property only of the pair of adhering materials, might be measured based on sticking distance experiments.
- Subjects
ADHESION; SOLIDIFICATION; DETACHMENT reactions; MELT spinning; COPPER compounds; SUBSTRATES (Materials science)
- Publication
Metallurgical & Materials Transactions. Part B, 2014, Vol 45, Issue 6, p2262
- ISSN
1073-5615
- Publication type
Article
- DOI
10.1007/s11663-014-0128-6