Nanodiamond reinforced silver matrix nanocomposites with different nanodiamond content are produced from pure silver and nanodiamond powders by a combination of two severe plastic deformation methods, ball-milling and high-pressure torsion (HPT). The ball milling parameters are varied to improve the distribution of the nanodiamonds in the powder blends. An optimized processing route combining both processes has been developed to achieve a homogenous dispersion of small nanodiamond particles in a nanocrystalline silver matrix. The microstructure of these nanocomposites was characterized by scanning and transmission electron microscopy. The mechanical properties were characterized by microhardness measurements and tensile tests. An increasing amount of nanodiamonds (up to 5 wt% and 15 vol%, respectively) can raise the microhardness by up to 70% and the tensile strength by up to 60% of the values achieved in HPT deformed pure silver. The microhardness and tensile strength is about 5 times higher than microcrystalline pure silver.

通过两种严重的塑性变形方法（球磨和高压扭转（HPT））的组合，由纯银和纳米金刚石粉末生产出具有不同纳米金刚石含量的纳米金刚石增强的银基纳米复合材料。改变球磨参数以改善纳米金刚石在粉末混合物中的分布。已经开发出结合了两种方法的优化的处理路径以实现纳米金刚石颗粒在纳米晶体银基质中的均匀分散。这些纳米复合材料的微观结构通过扫描和透射电子显微镜表征。通过显微硬度测量和拉伸试验来表征机械性能。越来越多的纳米金刚石（高达5 wt％和15 vol％，分别可以使HPT变形纯银的显微硬度提高70％，抗拉强度提高60％。显微硬度和抗拉强度约为微晶纯银的5倍。