Vortex Structures (IMAGE) Trinity College Dublin Caption The upper part shows a cold spray copper coating, with very visible vortex-like structures twirling around an aluminium substrate in the bottom part (EBSD image). Credit Trinity College Dublin. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.