Study Of Irradiation Damage Induced By Xe¹⁷⁺ And H⁺ Irradiation In Metallic Glasses Ni₆₂Ta₃₈,Fe₈₀Si_7.43B_12.57 And Metal W

One of the key factors that whether the fusion device could operate stablely or not is the resistant against irradiation damage of facing plasma materials in controlnuclear fusion. Due to the special structure of the long-range disorder and short-range order, no crystal lattice defects and the different anti-irradiation performance form that in traditional materials, metal glass has the potential to be stabilized candidate materials which used in fusion device. In This paper, the H+ion, which the energy is 250keV with the fluence of 1×1017、2×1017、 5、1017 and 1x1018ions/cm2, and the Xe17+ion, which the energy is 4.25MeV with the fluence of 5×1014、1×1015,2×1015 and 5×1015ions/cm2 had be selectedto be the irradiation ions. Metal glass Ni62Ta38, Fe80Si7.43B12.57 and polycrystalline W, which is the most promising candidate materials were irradiated. Anti-radiation performance against Xe17+ions and H+ions of metal glass and metal W were investgated by comparing the structure and the performance before and after the irradiation.A series of irradiation damage parameters in glass Ni62Ta38、 Fe80Si7.43B12.57 and metal W which include range, electron energy loss, nuclear energy loss, vacancy, and the distribution of the DPA in Xe17+, H+ions irradaiton with different dosage and energy were calculated by SRIM process. The results indicated that ranges of metal glass Ni62Ta38、Fe80Si7.43B12.57 and polycrystalline W under Xe17+ion irradiation, were 594.8nm,693.7nm and 441.6nm, respectively. The electronic energy loss and nuclear stopping power, of the metallic glasses were smaller than that of W, the vacancy peak and the DPA peak values of the metallic glasses were bigger than that of W. The range of the metallic glass Ta3sNi62 under H+ions irradiation was 1.18 um. The electronic energy loss, nuclear stopping power, DPA peak value and vacacices peak value of the metal glasses under H+ions irradiation were less than that under the Xe17+ion irradiation, and the concentration peak value of incident particles in metallic glass were bigger than that under the Xe17+ion irradiation.The changes of structure and performance of metal glass Ni62Ta38、Fe80Si7.43B12.57 and polycrystalline W were detected by XRD、SEM and AFM to investgate the ion irradiation resistance behavior of metal glass and metal W. The following results were obtained:metal glass Fe80Si7.43B12.57 and Ni62Ta38 maintained good amorphous structure after Xe17+and H+ ions irradiation of different doses and energy, and there was no obvious irradiation damage appeared on the surface of them. Besides, surface root mean square roughness increased initially with the increase of irradiation dose while decreased when the dose increase further. Under different doses of Xe17+ion irradiation, the phase structure of metal W did not changed. However, due to the existence of the compressive stress in the sub-surface layer of metal W, the diffraction peaks of the tungsten shifted to the high angle region. RMS of irradiated surface increased with the increase of irradiation dose firstly, and then decreased.After different doses of Xe17+ion irradiation, the hardness of metal W increased due to the existence of defects. Metal glass Ni62Ta38、Fe80Si7.43B12.57 and metal W have good resistance to Xe17+ and H+ ions irradiation ability.