Ultrafine Cu precipitates in neutron-irradiated Fe-0.3wt%Cu model alloys are studied by positron lifetime and coincidence Doppler broadening of positron annihilation radiation. We found that irradiation-induced vacancies bound with Cu solute atoms make aggregations to form vacancy clusters (microvoids) and the inner surfaces of the microvoids are mostly coated with Cu atoms. The microvoids recover by post-irradiation annealing up to 400°C. However, the Cu aggregations survive up to higher temperatures as defect-free ultrafine Cu precipitates.
|ジャーナル||Materials Science Forum|
|出版ステータス||Published - 2001|
|イベント||12th International Conference on Positron Annihilation - Munchen, Germany|
継続期間: 2000 8 6 → 2000 8 12
ASJC Scopus subject areas