通过真空电弧熔炼成功制备了Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金,并添加5%(原子分数)的碳元素,研究了碳元素对该高熵合金的相结构、微观组织以及力学性能的影响。研究发现,Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金由FCC相和BCC相条...通过真空电弧熔炼成功制备了Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金,并添加5%(原子分数)的碳元素,研究了碳元素对该高熵合金的相结构、微观组织以及力学性能的影响。研究发现,Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金由FCC相和BCC相条状交错组成,并且BCC相区存在大量的纳米B2相。加入5%(原子分数)的碳元素后,合金中的BCC相和纳米B2相转变为FCC相,同时在晶界处产生大量的碳化物M 7C 3。由于碳原子的加入,合金的平均延伸率由18%提高到26%,而合金的抗拉强度变化不大,保持在730 MPa左右。展开更多
We present a scheme for calculating atomic single-particle wave functions and spectra with taking into ac-count the nonspherical effect explicitly. The actual calculation is also performed for the neutral carbon atom ...We present a scheme for calculating atomic single-particle wave functions and spectra with taking into ac-count the nonspherical effect explicitly. The actual calculation is also performed for the neutral carbon atom within the Hartree-Fock-Slater approximation. As compared with the conventional atomic structure of the spherical approximation, the degenerate energy levels are split partially. The ground state values of the total orbital and spin angular momenta are estimated to be both about unity, which corresponds to the term P3PP in the LS-multiplet theory. This means that the nonspherical effect may play an essential role on the description of the magnetization caused by the orbital polarization.展开更多
The scattering factor of C60 molecule have been calculated according toX-ray diffraction theory. By comparing it with the atomic scattering factor of carbon,it is found that the scattering factor of C60 molecule is a ...The scattering factor of C60 molecule have been calculated according toX-ray diffraction theory. By comparing it with the atomic scattering factor of carbon,it is found that the scattering factor of C60 molecule is a sine-oscillating attenuate finction of sinθ/λ depending on the direction of the incident beam, which is attenuatedmore quickly than that of single carbon atom. However, there is nO evident differencefor the different directions when 0.00≤sinθ/λ≤0.15.展开更多
文摘We present a scheme for calculating atomic single-particle wave functions and spectra with taking into ac-count the nonspherical effect explicitly. The actual calculation is also performed for the neutral carbon atom within the Hartree-Fock-Slater approximation. As compared with the conventional atomic structure of the spherical approximation, the degenerate energy levels are split partially. The ground state values of the total orbital and spin angular momenta are estimated to be both about unity, which corresponds to the term P3PP in the LS-multiplet theory. This means that the nonspherical effect may play an essential role on the description of the magnetization caused by the orbital polarization.
文摘The scattering factor of C60 molecule have been calculated according toX-ray diffraction theory. By comparing it with the atomic scattering factor of carbon,it is found that the scattering factor of C60 molecule is a sine-oscillating attenuate finction of sinθ/λ depending on the direction of the incident beam, which is attenuatedmore quickly than that of single carbon atom. However, there is nO evident differencefor the different directions when 0.00≤sinθ/λ≤0.15.
