Renewable Resources as Promising Materials for Obtaining Graphene Oxide-like Structures.

Currently, one of the topical directions in the field of production and application of graphene-like nanostructures is the use of renewable natural raw materials, which have unlimited resources for an economically efficient large-scale yield of a product with environmental safety. In this regard, we present the production of graphene oxide (GO) from a renewable natural raw material of plant biomass, birch activated carbon (BAC), and a comparison of the obtained physicochemical, mechanical, and electrical properties of birch activated carbon-graphene oxide (BAC-GO) and graphite-graphene oxide (G-GO) synthesized from the initial materials, BAC and graphite (G). Results obtained from this study confirm the successful oxidation of BAC, which correlates well with the physical-chemical dates of the G-GO and BAC-GO samples.

Synthesis and Investigation of Properties of Beryllium Ceramics Modified with Titanium Dioxide Nanoparticles.

Samples of beryllium ceramics, with the addition of micro- and nanoparticles TiO have been obtained by the method of thermoplastic slip casting. The microstructure of batch ceramics, consisting of micropowders and ceramics with TiO nanoparticles sintered at an elevated temperature, has been investigated. It was found that the introduction of TiO nanoparticles leads to changes in the mechanisms of mass transfer and microstructure formation, and the mobility of TiO at interfacial grain boundaries increases, which leads to the formation of elements of a zonal shell structure.

Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening.

This article presents a study of changes in the microstructure of Hadfield steel depending on the tensile deformation and cold rolling with the strain/stress level. It has been established that the change in the "σ-ε" curve (at ε = 5%) is accompanied by a 1.5-times decrease in the strain-hardening coefficient.