Effect on mechanics properties and microstructure of molybdenum by high intensity pulsed ion beam irradiation
Effect on mechanics properties and microstructure of molybdenum by high intensity pulsed ion beam irradiation
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DOI：
10.1016/j.surfcoat.2020.125333
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发表时间：
2020-02
影响因子：
5.4
通讯作者：
H. Zou;Lisong Zhang;Tong Guan;Xiaonan Zhang;G. Remnev;S. Pavlov;You-nian Wang;X. Mei
中科院分区：
文献类型：
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作者：
H. Zou;Lisong Zhang;Tong Guan;Xiaonan Zhang;G. Remnev;S. Pavlov;You-nian Wang;X. Mei
本文采用85%Cn +15%H+的强流脉冲离子束（HIPIB）辐照结晶钼。研究了不同辐照时间和辐照能量密度下辐照前后的表面结构和力学性能。HIPIB辐照后，钼内部产生应力。随着能量密度的增加，热效应明显增强，导致钼的择优取向。当能量密度达到1.6- 2.5J/cm ~ 2，脉冲次数为3次时，钼表面出现凹坑和裂纹。此外，在钼的近表面区域形成的α-Mo 2C相有利于硬度的提高。HIPIB辐照后的平均硬度比（Hirr/Hunirr）和Nix-Gao模型表明，随着脉冲数和能量密度的增加，钼的宏观硬度降低。与离子注入对硬度提高的作用相比，HIPIB热辐照的退火效应对钼硬度的降低起着更重要的作用。钼的硬度在综合作用下降低。
In this paper, high intensity pulsed ion beam (HIPIB) of 85% Cn++ 15% H+was used to irradiate crystalline molybdenum. Before and after irradiation, the surface structure and mechanical properties were studied with different irradiation times and energy densities. After HIPIB irradiation, stress was generated inside the molybdenum. As the energy density increases, the thermal effect which was enhanced apparently causes a preferred orientation in the molybdenum. When the energy density reaches 1.6–2.5 J/cm2with 3 pulses, craters and cracks appear on the surface of molybdenum. Besides, the α-Mo2C phase formed in the near-surficial region of molybdenum is beneficial to the hardness increasement. After HIPIB irradiation, the ratio of average hardness (Hirr/Hunirr) and Nix-Gao model show that the macro hardness of molybdenum decreases with the increase of pulse number and energy density. Compared with the effect of ion implantation on hardness improvement, the annealing effect of HIPIB thermal irradiation plays a more important role in the reduction of molybdenum hardness. The hardness of the molybdenum decreases under the combined action.