PHASE-SEPARATION IN ION BOMBARDED FENI INVAR-ALLOYS

被引:11
作者
GALLAS, MR
AMARAL, L
DAJORNADA, JAH
机构
[1] Instituto de Física, Universidade Federal Do Rio Grande Do Sul
关键词
MOSSBAUER-SPECTROSCOPY; SANTA-CATHARINA; NI ALLOYS; IRON; STATE; IRRADIATION; TEMPERATURE; METEORITE;
D O I
10.1063/1.350325
中图分类号
O59 [应用物理学];
学科分类号
摘要
Studies of the effects of ion bombardment on the phase equilibria and ordering of FeNi alloys with 30.6 and 39.5 at. % Ni were performed. The FeNi samples were bombarded with Ne, Ar, and Kr at different doses and temperatures, and analyzed using the conversion electron Mossbauer spectroscopy (CEMS) technique with Fe-57. The changes in the CEMS spectra of Fe69.4Ni30.6 and Fe60.5Ni39.5 alloys, bombarded with Ne and Ar, indicate a phase separation, but no evidence of ordering. The Kr bombardment does not produce any change, however samples of 39.5 at. % Ni already showing phase separation returned to the single phase state after Kr irradiation. Our results give strong evidences of a prevalence of displacement mixing for bombardment with heavier ions, and of radiation enhanced diffusion for bombardment with lighter ions.
引用
收藏
页码:131 / 134
页数:4
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