Quasidynamic compaction of a mesostructural material with inclusions reinforced by nanocrystalline particles

A quasidynamic compaction technique is used to produce a mesostructural composite that represents the matrix framework from the base material filled with inclusions. The size of the latter is comparable with the matrix grain size. The mesostructural composite base is the powder of electrolytic copper or internally oxidized copper subjected to mechanical alloying with a nanocomposite. The latter is a mixture of 60 % of copper and 40 % of nanosized TiB2 particles. Due to high deformations the material exhibits the microstructure self-organization and the constant size of reinforcing TiB2 particles in the inclusions. Mechanical properties of the mesostructural composite exceed considerably those of the composite matrix. Mechanical properties of alloys from the internally oxidized copper matrix and 6-9 vol. % of TiB2 nanoparticles are close to properties of copper-based alloys with 18 vol. % of TiB2 nanoparticles. The electrical resistance of the mesostructural composite with the internally oxidized copper matrix (6-9 vol. % of TiB2 nanoparticles) is 2-4 % higher than that of internally oxidized copper and the electrical resistance of the copper-based alloy (18 vol. % of TiB2 nanoparticles) is 8 % higher.