The effects of Te addition on the microstructure, strength and electrical conductivity of pure aluminum were investigated, for improving the strength and electrical conductivity of resulting alloys. It was found that the tensile strength and electrical conductivity of the studied alloys increased by 25.8% and 2.8%, respectively, compared with those for pure aluminum (58 MPa and 62.06% IACS), respectively, by adding 0.1 wt% Te. Several mechanisms may account for the observed improvement of the alloys’ strength and electrical conductivity. First, Te addition can refine the grain size of pure aluminum by introducing more nucleation sites and suppressing grain growth through boundary precipitation. Second, the precipitation morphology changes from fine-needle or sheet-like to ellipsoidal shapes, likely improving the alloys’ tensile properties. Finally, Te can purify the melts by forming Al-Te-Fe-Si intermetallics at the grain boundaries, likely reducing the lattice distortion and increasing the electrical conductivity.

研究了 Te 添加对纯铝的显微组织、强度和电导率的影响，以提高所得合金的强度和电导率。结果表明，与纯铝（58 MPa 和 62.06% IACS）相比，通过添加 0.1 wt% Te，所研究合金的拉伸强度和电导率分别提高了 25.8% 和 2.8%。观察到的合金强度和导电性提高的原因可能有多种机制。首先，Te的添加可以通过引入更多的成核位点和通过边界析出抑制晶粒生长来细化纯铝的晶粒尺寸。其次，析出形态从细针状或片状变为椭圆形，可能提高合金的拉伸性能。最后，