Diffuse X-ray scattering studies of neutron- and electron-irradiated Ni, Cu and dilute alloys

P. Ehrhart, R. S. Averback

Research output: Contribution to journalArticlepeer-review


Pure Ni and Cu, as well as dilute NiSi0.01, NiGe0.01 and CuBe0.001 alloys, have been irradiated at 6 K with either fast neutrons or 3 MeV electrons. Starting from annealing temperatures well below annealing stage III (i.e. Ta ≈ 77 K for Cu and Ta ≈ 295 K for Ni) the evolution of the defect structures was studied using diffuse X-ray scattering methods. For both types of irradiation of the pure metals, large interstitial and vacancy dislocation loops developed on annealing. The differences between the behaviour of neutron-irradiated Ni and Cu are discussed in terms of the total number of defects surviving spontaneous recombination and the probability of cascade collapse. A dramatic suppression in the growth of the clusters was observed for the NiSi0.01 and NiGe0.01 alloys and complete recovery was consequently observed at lower temperatures. For the neutron-irradiated, more dilute CuBe0.01 alloys, a suppression of cluster growth was observed only after annealing above stage III. These results are discussed within a model for the trapping reactions.

Original languageEnglish (US)
Pages (from-to)283-306
Number of pages24
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number3
StatePublished - Sep 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys


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