原子氧對航天材料的影響與防護

The effects of the proton irradiation on Fe-Ni soft magnetic alloy

摘要: 采用質(zhì)子加速器對Fe-Ni軟磁合金進行8 MeV質(zhì)子輻照，研究其磁性能及組織結(jié)構(gòu)與缺陷變化情況。研究結(jié)果表明，隨質(zhì)子輻照吸收劑量的增加，F(xiàn)e-Ni合金的矯頑力增大，磁導(dǎo)率下降，飽和磁感應(yīng)強度未受影響。X射線衍射（XRD）結(jié)果表明輻照未引起相結(jié)構(gòu)的變化，但使晶格發(fā)生了畸變。正電子湮沒分析表明，輻照導(dǎo)致了空位等材料缺陷。

Abstract: A radiation experiment with 8 MeV proton was carried out with an accelerator to study the magnetic property and the microstructure as well as the flaw distribution of the Fe-Ni soft magnetic alloy. It is shown that after the proton radiation, the coercivity of the Fe-Ni soft magnetic alloy goes up with the increase of the absorbed dose and the decrease of the magnetic permeability. The saturation magnetic induction remains stable. The XRD results show that irradiation does not cause phase changes in the structure, but causes lattice distortions. The positron annihilation analysis shows that the irradiation leads to vacancies and other flaws.

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