کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8039118 | 1518596 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of elastic collisions and electronic excitation on lattice structure of NiTi bulk intermetallic compound irradiated with energetic ions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
NiTi bulk intermetallic compound with the B19â² structure was irradiated with 1â¯MeV He, 5â¯MeV Al, 16â¯MeV Au and 200â¯MeV Xe ions, and the change in lattice structure near the surface by the ion bombardment was investigated by using the grazing incidence X-ray diffraction (GIXD) and the extended X-ray absorption fine structure (EXAFS). The lattice structure transformation by the irradiation strongly depends on ion species and/or energies. For the 1â¯MeV He irradiation, the lattice structure changed from B19â² to the A2 structure, but did not show an amorphization even after the high fluence irradiation. For the 5â¯MeV Al irradiation, the samples are partially amorphized. For the 16â¯MeV Au irradiation, the lattice structure of the NiTi samples changed nearly completely from the B19â² structure to the amorphous state via the A2 structure. The value of dpa (displacement per atom) which is needed for the amorphization is, however, much smaller than the case of the Al ion irradiation. For the 200â¯MeV Xe ion irradiation, the lattice structure completely changed to the A2 structure even by a small ion fluence. The dependence of the lattice structure transformation on elastic collisions (dpa), the spectrum of the primary knock-on (PKA) atoms and the density of energy deposited through electronic excitation was discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 427, 15 July 2018, Pages 14-19
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 427, 15 July 2018, Pages 14-19
نویسندگان
M. Ochi, H. Kojima, F. Hori, Y. Kaneno, S. Semboshi, Y. Saitoh, Y. Okamoto, N. Ishikawa, A. Iwase,