摘要
Mo ions are implanted into aluminium with a high ion flux and high dose at elevated temperatures of 300℃,400℃and 500℃.X-ray diffraction spectra show that the Al12Mo phases are formed.Rutherford backscattering spectroscopy indicates that a profile of Mo appears in Al around the depth of 550nm and with an atomic concentration of~7%,when Mo is implanted to the dose of 3×10^(17)/cm^(2) with an ion flux of 45μA/cm^(2)(400℃).If the dose increases to 1×10^(18)/cm^(2) at the same ion flux,the penetration of Mo ions in Al can reach a depth of 2μm,which is greater than the ion project range Rp(52.5nm).The results show that anomalous diffusion takes place.Owing to the intense atom collision cascades,the diffusion coefficient increases greatly with the increase of the ion flux and dose.The Mo diffusion coefficients in Al are calculated.The Mo retained dose in A1 increases obviously with the increase of the ion flux.
作者
张通和
吴瑜光
邓志威
钱卫东
ZHANG Tong-He;WU Yu-Guang;DENG Zhi-Wei;QIAN Wei-Dong(Key Laboratory in University for Radiation Beam Technology&Material Modification,and Institute of Low Energy Nuclear Physics,Beijing Normal University,and Beijing Radiation Center,Beijing 100875)
基金
Supported by The National Natural Science Foundation of China under Grant Nos.59671051 and 59871003
the 863 High Technology Program of China(863-715-023-02-01).