In the present research study, Friction stir processing (FSP) has been utilized to prepare nano surface composites, AA7075 based matrix was reinforced with B₄C nanoparticles (size <30 nm). The aim of this study is to form a thin layer of B₄C over the surface of AA7075 based matrix material through Self-Assembled Monolayer (SAM) technique followed by Friction stir processing. The major advantage of SAM is to minimize the quantity of B₄C nanoparticles used in the preparation of nano surface composites. Additionally, this research also investigates the effect of tool rotation speed of Friction stir processing on mechanical and wear properties of processed nano surface composite. The results observed a uniform dispersion of nanoparticles in the processed nano surface composite and an improved value of microhardness with maximum value was found to be 185 Hv of the sample processed at 1200 rpm, compared to base metal. For the constant load, as FSP tool rotation speed increases, wear resistance increases from 1000 to 1200 rpm and decreases slightly for 1400 rpm. Scanning Electron Microscope (SEM) micrograph, tensile test and Field Emission Scanning-Electron Microscope (FESEM) fractography image used to study microstructure and the mechanical properties of processed nano surface composite. The x-ray Diffraction (XRD) showed the presence of B₄C nanoparticles. Processed nano surface composites can be used for aircraft and automobile industry applications.

在本研究中，摩擦搅拌处理 (FSP) 已被用于制备纳米表面复合材料，AA7075 基基体用 B ₄ C 纳米颗粒（尺寸 <30 nm）增强。本研究的目的是通过自组装单层 (SAM) 技术和摩擦搅拌处理在 AA7075 基基体材料的表面上形成 B ₄ C薄层。SAM 的主要优点是最大限度地减少 B ₄的数量C纳米颗粒用于制备纳米表面复合材料。此外，本研究还研究了摩擦搅拌加工的刀具转速对加工后的纳米表面复合材料的机械和磨损性能的影响。结果观察到纳米颗粒在加工过的纳米表面复合材料中均匀分散，并且发现与贱金属相比，在 1200 rpm 下加工的样品的显微硬度值提高了 185 Hv，最大值为 185 Hv。对于恒定负载，随着FSP刀具转速的增加，耐磨性从1000转1200转增加，1400转时略有下降。扫描电子显微镜 (SEM) 显微照片，拉伸试验和场发射扫描电子显微镜 (FESEM) 断口图像，用于研究加工后的纳米表面复合材料的微观结构和机械性能。X 射线衍射 (XRD) 表明存在 B₄ C 纳米粒子。加工过的纳米表面复合材料可用于飞机和汽车工业应用。