{"id":7781,"date":"2022-07-28T12:40:26","date_gmt":"2022-07-28T12:40:26","guid":{"rendered":"https:\/\/www.africa-press.net\/sierra-leone\/all-news\/russian-scientists-create-new-protective-composite-for-aerospace"},"modified":"2022-07-28T12:59:24","modified_gmt":"2022-07-28T12:59:24","slug":"russian-scientists-create-new-protective-composite-for-aerospace","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/sierra-leone\/all-news\/russian-scientists-create-new-protective-composite-for-aerospace","title":{"rendered":"Russian Scientists Create New Protective Composite for Aerospace"},"content":{"rendered":"

Africa-Press – Sierra-Leone. <\/strong><\/span>Researchers from the National University of Science and Technology \u201cMISiS\u201d (NUST MISIS) have obtained a new refractory composite for aerospace applications.<\/p>\n

According to the creators, they have succeeded in simultaneously increasing the melting point, thermal conductivity and oxidation resistance, as well as reducing the density of the material and energy costs of its production. Their study results were published in the Ceramics International journal.<\/p>\n

Rocket and space equipment must be able to withstand intensive loads at temperatures above 2000 \u00b0\u0421 when passing through the Earth’s atmosphere. According to scientists, heat protective coatings made of composite materials are used in the production of these elements.<\/p>\n

However, the materials must also be able to withstand intense oxidation under such conditions. Therefore, the most common carbon-carbon composites are not used at temperatures above 1600 \u00b0C as oxidation becomes uncontrollable beyond this temperature: the active oxygen ingress and product formation from the gas-phase reactions leads to the coating\u2019s complete burnout.<\/p>\n

A scientific team from the NUST MISIS Research Center \u201cStructural Ceramic Materials\u201d comprised of Veronika Suvorova, Andrey Nepapushev and Dmitry Moskovskikh has developed a new composite material based on hafnium carbonitride, which is resistant both to high temperature and oxidation.<\/p>\n

According to him, their material can be applied during the production of the critical assembly units of the rocket-space and other perspective equipment. The segments of the constructions made of the new composite will provide effective heat protection in the points of full flow braking that experience the highest thermal load, the creators explained.<\/p>\n

The scientists explained that they have synthesized hafnium carbonitride by burning a mixture of hafnium and carbon in a nitrogen atmosphere, and used spark plasma sintering to produce the volumetric material. According to the researchers, this method provides a simple, fast and energy-efficient approach that is suitable for industrial production.<\/p>\n

The study was carried out within the framework of the Russian Science Foundation (RSF) Grant No. 19-79-10280. At the next stage, the research team intends to work out the production technology from the new composite of various construction elements operated in high-speed gas flows.<\/p>\n\r\n