In the present study, Fe matrix composites reinforced with nano-diamond (ND) particulates were fabricated by hot-press sintering. The influence of the concentration of ND on the mechanical and tribological properties of as-sintered Fe/ND composites was investigated. The microstructures and properties of the Fe/ND composites were examined using X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. A pearlite microstructure is formed due to the reaction between Fe and ND in the sintering. The presence of ND provides higher hardness, compressive strength, and flexural strength. The composite with 1 wt% ND exhibits 51.5% higher hardness, 37.4% higher compressive strength, and 76.2% higher flexural strength than sintered Fe. In addition, the wear resistance will increase as the ND concentration increases. Fe/2 wt% ND composite exhibits much lower friction coefficient (COF) and higher wear resistance than a Fe/1 wt% ND composite and sintered Fe.

在本研究中，通过热压烧结制备了纳米金刚石（ND）颗粒增强的铁基复合材料。研究了ND浓度对烧结Fe / ND复合材料力学性能和摩擦学性能的影响。使用X射线衍射，拉曼光谱和扫描电子显微镜检查了Fe / ND复合材料的微观结构和性能。由于Fe和ND在烧结过程中的反应，形成了珠光体组织。ND的存在提供了更高的硬度，抗压强度和抗弯强度。与烧结的Fe相比，具有1 wt％ND的复合材料具有更高的51.5％的硬度，更高的37.4％的压缩强度和更高的76.2％的弯曲强度。另外，随着ND浓度的增加，耐磨性将增加。