Bobrynina Elizaveta V, Larionova Tatiana V, Koltsova Tatiana S, Shamshurin Aleksey I, Nikiforova Oksana V, Tolochko Oleg V, Puguang Ji, Fuxing Yin
Peter the Great Saint-Petersburg Polytechnic University, Politekhnicheskaya 29, 195251 St. Petersburg, Russia.
The National Technological Initiative Competence Center of SPbPU, Politekhnicheskaya 29, 195251, St. Petersburg, Russia.
Nanomaterials (Basel). 2020 Sep 27;10(10):1929. doi: 10.3390/nano10101929.
Copper-based composite materials strengthened with nanosized fullerene soot particles were produced by mechanical milling and hot pressing technology with a content of carbon up to 5 wt. %. The microstructure of the composite powders and the compacts prepared using them were examined by light microscopy, SEM, EDS, XRD, and XPS; hardness, heat conductivity, and tribological characteristics were measured. The interesting feature of the observed microstructure was a "marble" pattern formed by a white boundary net. The study shows homogeneous distribution of carbon inside the copper grains and its lower concentration in the grain boundaries. The effect was caused by a reaction of carbon with oxygen adsorbed by the copper particles surface. The maximal hardness of the material is 160 HB for the sample with 0.5 wt. % of fullerene soot; this material has the minimal friction coefficient (0.12) and wear in a dry friction condition. Heat conductivity of the material (Cu-0.5 wt. % C) is 288 W/m*K.
采用机械球磨和热压技术制备了碳含量高达5 wt.%的纳米富勒烯烟灰颗粒增强铜基复合材料。通过光学显微镜、扫描电子显微镜（SEM）、能谱仪（EDS）、X射线衍射仪（XRD）和X射线光电子能谱仪（XPS）对复合粉末及其制成的压块的微观结构进行了研究；测量了硬度、热导率和摩擦学特性。观察到的微观结构的有趣特征是由白色边界网形成的“大理石”图案。研究表明，碳在铜晶粒内部均匀分布，在晶界处浓度较低。这种效应是由碳与铜颗粒表面吸附的氧发生反应引起的。对于含有0.5 wt.%富勒烯烟灰的样品，材料的最大硬度为160 HB；该材料在干摩擦条件下具有最小的摩擦系数（0.12）和磨损。材料（Cu-0.5 wt.% C）的热导率为288 W/m*K。
