Resumen de Spiral cracks are a feature, not a flaw
Unusually beautiful and uniform cracks that form in high-tech materials could be used to manufacture micro-patterned surfaces. Joel Marthelot of ESPCI ParisTech in France and his colleagues noticed the cracks when studying thin films of silicate materials, which are used as a coating inside lasers. Investigating further, Marthelot and his colleagues realized that a combination of elastic energy within the film and the process of peeling away from the underlying surface makes an initial crack replicate itself an interval that depends on the thickness of the film.
