Researchers have developed technology that allows you to increase the strength to bending and the viscosity of the destruction of silicon carbide by 50%.
Silicon carbide is a promising structural material for the manufacture of refractory parts. Currently, he increasingly finds the application in industry as a semiconductor, construction, refractory and abrasive material. For example, it is used for the manufacture of turbine blades, DVS parts and ceramics for automotive industry.
The problem is that due to the high sensitivity of silicon carbide to structural defects, it often has low tensile strength, bending and crack resistance. However, scientists from the National Research Technology University MISIS have found a way to improve the sinteringability of the material by forming nanofolocon reinforcing in it.
The team used the technology of self-propagating high-temperature synthesis, conducted in several stages. First, silicon powders, carbon, tantalum and polytetrafluoroethylene were mixed in a planetary mill. Next, the resulting mixture was burned in the reactor, where in the process of burning it was formed by nanoprovoc. In the last stage, the substance spelled in a vacuum furnace.
This made it possible to synthesize silicon carbide with a reinforced matrix that increases its strength to bending and crack resistance by 1.5 times. In addition to improving the mechanical characteristics of the material, the nanofibre reduces the required temperature and the duration of sintering from several hours at 1800-2000 ° C to 60 minutes at 1450 ° C, reducing the cost of production and expanding the application area in aircraft.
In addition to improving existing, researchers also invent new materials with amazing properties. We recently reported on the development of the world’s first material, which
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