In this paper, first, the desired NiFe₂O₄ nanoparticles were produced using the hydrothermal method then the AA7075/NiFe₂O₄ surface nanocomposite was fabricated by the friction stir processing (FSP) method. The results show that the hydrothermal method is very suitable for making NiFe₂O₄ nanoparticles with a fine and uniform structure that the fabricated nanoparticles have a superparamagnetic property that can be used for radar-absorbing coatings. The nanoparticles were well distributed in the base AA7075 aluminum alloy sheet in addition to the fine-grained structure achieved using FSP. The microhardness of the FSPed and surface nanocomposites were significantly improved compared to the base metal and increased with the increasing pass number of FSP. Also, the tensile properties consist of the ultimate tensile strength (UTS), formability, and toughness decrease with increasing the number of FSP passes.

在本文中，首先使用水热法制备了所需的 NiFe ₂ O ₄纳米颗粒，然后通过摩擦搅拌处理 (FSP) 方法制备了 AA7075/NiFe ₂ O ₄表面纳米复合材料。结果表明，水热法非常适合制备NiFe ₂ O ₄纳米粒子具有精细均匀的结构，所制备的纳米粒子具有超顺磁性，可用于雷达吸收涂层。除了使用 FSP 获得的细粒结构外，纳米颗粒还很好地分布在基础 AA7075 铝合金板中。与母材相比，FSPed 和表面纳米复合材料的显微硬度显着提高，并且随着 FSP 道次次数的增加而增加。此外，拉伸性能包括极限拉伸强度 (UTS)、成型性和韧性随着 FSP 道次数量的增加而降低。