DH3 Glass (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The two-phase structure of DH3, a metallic glass alloy of five different metals. When the space between the dendritic branches are properly spaced, they can stop cracks before they propagate. Credit William Johnson, Caltech; Robert Ritchie, Berkeley Lab 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.