@misc{oai:repo.qst.go.jp:00078769,
 author = {Takano, A. and Sugita, K. and Ohnishi, T. and Ogawa, N. and Iwase, A. and Kaneno, Y. and Wada, T. and Kato, H. and Maekawa, Masaki and Kawasuso, Atsuo and Ishikawa, N. and Kinomura, A. and Hori, F. and Maekawa, Masaki and Kawasuso, Atsuo},
 month = {Oct},
 note = {We are trying to make new functional materials by the modification of local structure and character using high energetic particles irradiation, such as electron and heavy ions. So far, we found that heavy ion irradiation changes local ordered structure in Ni-based intermetallic compounds, which are used as structural materials with excellent high-temperature resistance and high strength, from a crystal structure to an amorphous state [1]. Amorphous is a non-equilibrium phase and has no long range ordered lattice structure so that the physical and mechanical properties are different from those of a crystal state. Therefore, we suggest that heavy ion irradiation induced amorphization can be used as a method of surface modification of materials. However, the amorphization of metallic materials by high energetic particles irradiation depends on radiation conditions and kind of materials. Then the amorphization process of alloys is not cleared yet so far. In this study, 200 MeV Xe, 16 MeV and 200MeV Au ions irradiation have performed for Zr50Cu40Al10 intermetallic compound, which can be produced for bulk amorphous alloy easily by quenching method [2]. Positron annihilation spectroscopy and X-ray analysis (XRD and EXAFS) have performed for this alloy before and after irradiation, in order to investigate the behavior of vacancy-type defects and the changing of local ordered structure. Also the Vickers hardness was measured for this alloy. XRD result shows that different behavior of heavy ion irradiation between two phases of Zr2Cu and Zr7Cu10 involved in this alloy. It is supposed that Zr2Cu phase amorphized preferentially by the effect of elastic displacement, and Zr7Cu10 phase amorphized by the effect of electronic excitation mainly., 2019 4th Japan-China Joint Workshop on Positron Science},
 title = {Local Structural Change of ZrCuAl Intermetallic Alloy by Swift Heavy Ion Irradiation},
 year = {2019}
}