Nanostructured Metal-Nanocarbon Composites: Production and Studying of Structural and Mechanical Properties

摘要

In the past two decades, the disign methods of nanostructured composites with hierarchical structure consisting of metal-matrix composed nanoparticles and various binding between them -so-called metal-matrix nanoconposites (MNCs)- have intensively develop. At manufacturing MNCs, numerous combinations of matrixes and additives are used. Fabrication methods are an important part of the design process for MNCs, as well. It is anticipates that bulk materials with nanocarbon constituents could have high mechanical properties due to peculiarities of the nanostructure and special properties of its nano-building blocks, such as nanodiamond, fullerenes and nanotubes. In this work we report the design and properties of bulk MNCs containing nanocarbon in metal nanocrystals, and nanocarbon also serves as a binding medium filling interfaces. These works were conducted within 2007÷2012 in TISNCM. We manufactured MNCs by mechanical alloying (high energy ball milling) of the parent materials, such as metals (Fe, Steels, Al, Al-alloys, Cu, W) and refractory carbides (WC, ZrC, TaC, TiC), with nanocarbon followed by high-pressure/high-temperature (HP/HT) treatment. Nanocarbon (C_60), soot, graphite and nanodiamond) was used as an additive. New nanostructured and modified by nanocarbon bulk samples has been sintered from appropriate nanoclusters.