Dispersion-strengthened Cu-25%Al alloy which contained roughly 4nm-sized alumina particles was bombarded with 300keV Cu+ ions at room temperature, to doses of 10 or 30dpa, at a displacement rate of 0.037dpa/s. Selected-area diffraction was used to study the phase stability under bombardment. The defect-cluster structure which was formed by irradiation was investigated using 2-beam techniques. It was found that small particles of alumina dissolved with increasing fluence. A large number of small Frank vacancy and interstitial dislocation loops (some 5nm in diameter), having various a/3<111> Burgers vectors were produced by the ions. In the region adjacent to the bombarded surface, the number of vacancy loops was greater than that of interstitial ones.

Microstructural Evolution in Cu-25Al Alloy under 300keV Cu+ Ion Irradiation. J.Li, H.Xu, J.Yu, B.Wu, Q.He: Journal of Nuclear Materials, 1998, 258-263, 945-9