Use of Technogenic Silica Fume and Brown Coal Semi-Coke in the Technology of Silicon Carbide

The paper describes thermodynamic experiments to determine the optimal temperature and time modes for the carbide production process from the briquette charge comprising silica fume and brown coal semi-coke, conditions for chemical enriching of silicon carbide, its phase, chemical and granulometric compositions and particle morphology

Refractory Core-Shell Powders for Additive Industries

The finished products obtained when the surfaces of powders of refractory materials (diamond, boron nitride, silicon carbide, tungsten carbide, tungsten) were coated with thin films by the method of iodide transport are presented. The developed method enables to obtain powder composite materials of core-shell type that have surface thickness varying in the range from 1 nm to several micrometers. From the powders modified by the films of metals and thier compounds composite materials were developed, their physical and mechanical characteristics were studied. The characteristics turned out to be substantially higher in comparison to materials sintered from the same powders but without coating. The probable fields of use of the composites in question were determined.</jats:p

Calculation of temperature of carbon disks of aircraft brakes with account of heat exchange with the environment

The temperature of the tribosurface of aircraft-brake carbon disk during braking is studied. Formula is advanced to calculate the temperature based on the geometrically one-dimensional unsteady heat model taking into account the convective heat exchange of the lateral surfaces of the disk with the air environment. Friction experiments with lab specimens made from the carbon material Termfar-ADF demonstrate the temperature variations. The experimental results are compared with the calculated results.</p