Researchers at Los Alamos are studying complex materials issues, in this case the defects deep inside certain types of cubic metals. This image shows a reaction between two “stacking fault tetrahedra,” a perfect SFT containing 15 vacancies and a defective SFT containing 13 vacancies. As the smaller SFT migrates through the material, (frames a and b), it eventually encounters the larger SFT (frame c), reacting with it to form a larger, perfect SFT containing 28 vacancies. The time for this reaction to occur at 700 degrees K is 237.64 nanoseconds. Courtesy/LANL
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