Scientists from the Russian National University of Science and Technology MISIS have developed a composite material combining high strength, thermal resistance, and durability. It may find application in aviation, energy, and mechanical engineering. This was reported on the
website of the Ministry of Science and Higher Education of the Russian Federation.
The problem with modern heat-resistant alloys is the loss of strength and oxidation during prolonged heating, which leads to component failure and increases the risk of accidents.
The researchers added aluminium oxide nanoparticles to an alloy of chromium, iron, cobalt, nickel, and copper. These particles prevent the penetration of oxygen, which is one of the causes of material degradation when heated, thereby preventing the formation of microcracks.
The alloy with the addition of aluminium oxide nanoparticles became 29 per cent stronger, 27 per cent harder, and its wear resistance increased sixfold. The material also withstood prolonged heating up to 750°C – the oxidation rate was reduced by half, the material retained its ductility, and it did not fail under compression.
“The new composite may find application in the manufacture of components exposed to high loads and temperature fluctuations: turbine and compressor parts, engine valves, nozzle elements, and protective coatings, as well as contact surfaces of electrical engineering equipment,” said engineer Umedzhon Narzulloev, who took part in the study.
Modern industry requires materials that can retain their properties under increased temperature and pressure.
Photo: cookelma /
iStock
Самые
актуальные новости стран БРИКС https://tvbrics.com