Disordering kinetics of Ni3Al under ion irradiation

S. Müller, C. Abromeit, S. Matsumura, N. Wanderka, H. Wollenberger

Research output: Contribution to journalConference articlepeer-review

12 Citations (Scopus)


The stability of the long-range-ordered (LRO) γ′ phase was investigated in the temperature interval 100 K ≤ T ≤ 773 K under 300 keV Ni+ irradiation. The radiation-induced intensity changes of the L12 superlattice reflections were monitored by TEM technique using a computer assisted, quantitative evaluation of the amplitudes of diffraction patterns obtained by image plates. The dynamical diffraction theory where the thickness of the investigated foils was taken into account was employed to determine the degree of order from the diffraction patterns. The fluences were varied up to 10 dpa. The results are compared with recent measurements of disordered zone sizes after low dose ion irradiation in Ni3Al. The measured temperature dependence below room temperature is consistent with the predictions of the thermal spike model for disordering, but for higher temperatures the results hint to a more complicated re-ordering process in disordered areas. A Ni3Al specimen which was completely disordered after 10 dpa at 200 K was used for a thermal annealing experiment. The annealing behavior confirms the importance of the heterogeneous state of the order for the re-ordering process under ion irradiation.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalJournal of Nuclear Materials
Publication statusPublished - May 1999
EventProceedings of the 1997 8th International Conference on Fusion Reactor Materials (ICFRM-8), Part C - Sendai, Jpn
Duration: Oct 26 1997Oct 31 1997

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering


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