作者: L. Pauchard , F. Elias , P. Boltenhagen , A. Cebers , J. C. Bacri
DOI: 10.1103/PHYSREVE.77.021402
关键词:
摘要: Upon drying, colloidal suspensions undergo a phase transformation from "liquid" to "gel" state. With further solvent evaporation, tensile stresses develop in the gel, which ultimately leads fractures. These generally manifest themselves regular cracking patterns reflect physical conditions of drying process. Here we show experimentally and theoretically how, case droplet magnetic colloid (ferrofluid), an externally applied field modifies stress gel therefore crack patterns. We find that analysis shape cracks allows one estimate value Young's modulus just before nucleation.