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Takahiro, Katsumi*; Ozaki, Koichi*; Kawatsura, Kiyoshi*; Nagata, Shinji*; Yamamoto, Shunya; Narumi, Kazumasa; Naramoto, Hiroshi*
Applied Surface Science, 256(4), p.972 - 975, 2009/11
Times Cited Count：12 Percentile：47.84(Chemistry, Physical)Nagata, Shinji*; Higashi, Seijiro*; Tsuchiya, Bun*; To, Kentaro*; Shikama, Tatsuo*; Takahiro, Katsumi*; Ozaki, Koichi*; Kawatsura, Kiyoshi*; Yamamoto, Shunya; Inoue, Aichi
Nuclear Instruments and Methods in Physics Research B, 257(1-2), p.420 - 423, 2007/04
Times Cited Count：16 Percentile：72.04(Instruments & Instrumentation)Structural modification and primary precipitates in the Zr
Al
Ni
Cu
alloy films (50-100 
m thickness) caused by radiation with 300-500 keV H, Ag, Cu and Au ions has been studied. The results of XRD indicated that a metastable primary phase was formed in the alloy by the heat treatment after ion irradiation, but no difference was observed just after the ion irradiation at room temperature. Furthermore, higher incident Au ion fluence effectively suppressed thermal precipitation of the Zr
Ni type crystalline phase in the alloy. The deposited energy dependence of the precipitation behavior indicated an increase of the nucleation sites by the implanted metal atoms, simultaneously with a decrease of the growth rate by higher energy deposition density.
Nagata, Shinji*; Tsuchiya, Bun*; Takahiro, Katsumi*; Ozaki, Koichi*; Inoue, Aichi; Yamamoto, Shunya; To, Kentaro*; Shikama, Tatsuo*; Kawatsura, Kiyoshi*
no journal, ,
Effect of the ion implantation on the phase transformation was studied for ZrAlNiCu glassy and crystalline alloys, using Au, Pt and Cu ions with 500 keV up to a fluence of 8
10
m
. In the glassy ZrAlNiCu alloys, the formation of a meta-stable or an ichosahedral phase was promoted as the primary precipitates, by successive heat treatment after the ion implantation. Ion induced amorphization and the suppression of the thermal precipitation was found in the pre-crystallized alloy. The Au atoms were retained along to their projected ranges at room temperature and did not diffuse during the heat treatment at 760 K for 30 s. On the other hand, implanted Pt atoms were not detected in the implanted layer even at room temperature. Changes of the binding energy of the core level electron and valence band structure indicated the formation of Au-Cu alloys in the implanted region.
Takahiro, Katsumi*; Ono, Yasuharu*; Ozaki, Koichi*; Kawatsura, Kiyoshi*; Narumi, Kazumasa; Sakai, Seiji; Naramoto, Hiroshi*; Yamamoto, Shunya; Nagata, Shinji*
no journal, ,
no abstracts in English
Takahiro, Katsumi*; Ozaki, Koichi*; Kawatsura, Kiyoshi*; Nagata, Shinji*; Yamamoto, Shunya; Narumi, Kazumasa; Naramoto, Hiroshi*
no journal, ,
no abstracts in English
