Abstract
Partially amorphous Ni-P alloys were formed by P ion implantation into pure Ni single crystals at low (15 K) and high (300 K) temperature. The implanted samples were then heated up or cooled down to the reverse temperature (respectively 300 and 15 K) and post-irradiated with increasing fluences of 370 keV Kr ions. The structural modifications caused by the final irradiation were monitored by in situ Rutherford backscattering and channeling experiments. The results show that the nature (metalloid concentration and size) of the amorphous clusters formed before the temperature change is modified by the Kr post-irradiation. This ion beam mixing induced phase transformation leads to the formation of amorphous clusters characteristic of the final irradiation temperature.
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