Lattice structure transformation and change in surface hardness of NiNb and NiTa intermetallic compounds induced by energetic ion beam irradiation

Kojima, Hiroshi*; Yoshizaki, Hiroaki*; Kaneno, Yasuyuki*; Semboshi, Satoshi*; Hori, Fuminobu*; Saito, Yuichi; Okamoto, Yoshihiro ; Iwase, Akihiro*

NiNb and NiTa intermetallic compounds, which show the complicated lattice structures were irradiated with 16 MeV Au $^{5+}$ ions at room temperature. The X-ray diffraction measurement revealed that the lattice structure of these intermetallic compounds changed from the ordered structures to the amorphous state by the ion irradiation. The irradiation-induced amorphization caused the increase in Vickers hardness. The result was compared with our previous results for NiAl and NiV, and was discussed in terms of the intrinsic lattice structures of the samples.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research B
Volume	:	372
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Pages	:	p.72 - 77
Publication Year/Month	:	2016/04
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Paper URL	:	https://doi.org/10.1016/j.nimb.2016.02.002
DOI for research data	:
Keywords	:	イオン照射効果; EXAFS; 金属間化合物
Research Facility	:	TIARA(イオン照射研究施設)
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Registration No. : AA20150879
JAEA Abstracts No. : 44001315
Paper Submission No. : 17987

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