The analytic representation of the transient radiation for an aperture excited by a rectangle pulse is obtained. It shows that the field duration and amplitude depend on the observation distance, the elevation angle, ...The analytic representation of the transient radiation for an aperture excited by a rectangle pulse is obtained. It shows that the field duration and amplitude depend on the observation distance, the elevation angle, the pulse width of the rectangle pulse and the aperture size.展开更多
The influence of the electromagnetic energy on the microstructure of Al-5Ti-B grain reflner was discussed.In this study,the electromagnetic energy was applied above the liquid phase line temperature.Compared with Al-5...The influence of the electromagnetic energy on the microstructure of Al-5Ti-B grain reflner was discussed.In this study,the electromagnetic energy was applied above the liquid phase line temperature.Compared with Al-5Ti-B without electromagnetic energy applied,the experimental results show that the size of secondary particles is reduced and its size distribution becomes more uniform.Simultaneously,the secondary phase particles are uniformly spread in the matrix response to the electromagnetic energy.Moreover,when adding Al-5Ti-B with electromagnetic energy to the pure aluminum melt,it is clear that the electromagnetic energy has a signiflcantly impact on reflning properties of Al-5Ti-B.The mean size of pure aluminum is reduced by 27.6%in maximum with more uniform size distribution.The change in the microstructure is attributed to the electromagnetic energy changes the melt structure.With the electromagnetic energy entry into the system,the electromagnetic energy reduces the size of atomic clusters and increases the number of atomic clusters,thus the number of nuclei increases.展开更多
文摘The analytic representation of the transient radiation for an aperture excited by a rectangle pulse is obtained. It shows that the field duration and amplitude depend on the observation distance, the elevation angle, the pulse width of the rectangle pulse and the aperture size.
基金Funded by the Inner Mongolia Natural Science Foundation of China(No.2018MS05008)the Inner Mongolia Natural Science Foundation of China(No.2020MS05046)the Project of Science and Technology Plan of Inner Mongolia Autonomous Region(No.2021GG0096)。
文摘The influence of the electromagnetic energy on the microstructure of Al-5Ti-B grain reflner was discussed.In this study,the electromagnetic energy was applied above the liquid phase line temperature.Compared with Al-5Ti-B without electromagnetic energy applied,the experimental results show that the size of secondary particles is reduced and its size distribution becomes more uniform.Simultaneously,the secondary phase particles are uniformly spread in the matrix response to the electromagnetic energy.Moreover,when adding Al-5Ti-B with electromagnetic energy to the pure aluminum melt,it is clear that the electromagnetic energy has a signiflcantly impact on reflning properties of Al-5Ti-B.The mean size of pure aluminum is reduced by 27.6%in maximum with more uniform size distribution.The change in the microstructure is attributed to the electromagnetic energy changes the melt structure.With the electromagnetic energy entry into the system,the electromagnetic energy reduces the size of atomic clusters and increases the number of atomic clusters,thus the number of nuclei increases.
