Transmission Electron Microscopy of Point‐Defect Clusters in Neutron‐Irradiated Metals. II. Platinum

Annealed, neutron‐irradiated, and neutron‐irradiated and subsequently annealed platinum has been investigated by means of transmission electron microscopy. In as‐annealed platinum black dots were observed; these defects occurred only near the foil surfaces and were similar to the polishing defects in copper [8]. Frank dislocation loops, prismatic dislocation loops, and voids were found in neutron‐irradiated foils. After annealing for 1 h at 543 °K the same defect types were observed, however, the contrasts of the defects were stronger. The results are compared with those of other authors.