29 сентября 2020  |  
6:09 PM  January 8, 2020

TSU scientist invented how to reduce shipbuilding aluminum alloys cost

© РИА Томск. Павел СтефанскийTSU scientist invented how to reduce shipbuilding aluminum alloys cost

TOMSK, Jan 8 – RIA Tomsk. Nikolay Kakhidze, graduate student of Tomsk State University Faculty of Physics and Engineering (FPE TSU) proposed to replace expensive scandium used in shipbuilding for hardening aluminum alloys with diamond or aluminum oxide nanoparticles; it is expected new material will cost four times cheaper, the university’s press service told RIA Tomsk.

It is noted that shipbuilding workers seek to replace heavy steel with light and ultra-light materials, which increases the carrying capacity of ships, increases their mobility and reduces fuel consumption. The decision was aluminomatric composite materials modified with scandium. However, the cost of scandium is quite high, and experts are looking for a more affordable modifier.

"The graduate student of FPE TSU Nikolay Kakhidze proposed to use diamond or aluminium oxide nanoparticles as an alternative to expensive scandium to harden aluminum alloys. The new material – nanocomposite – at the most rigorous calculations will cost 4 times cheaper than the scandium-containing analogue with fairly close physical and mechanical properties", – is said in the message.

The project was supported by the "UMNIK" program of the Foundation for Assistance to Small Innovative Enterprises (FASIE), 500 thousand rubles were allocated for its implementation. The scientist’s task will be to develop a method for the correct introduction of nanopowders into a metal melt.

© РИА Томск. Павел Стефанский
It is explained that when directly introduced into the melt, the nanoparticles coalesce into agglomerates, form pores around themselves, and instead of hardening particles, unwanted impurities are obtained. Kakhidze, using the experience of colleagues, suggested to evenly distribute nanopowders in micro-sized aluminum powder and synthesizing a ligature from this mixture, which is introduced into the melt when exposed to external fields – for a uniform distribution of nanoparticles.

Kakhidze plans to receive the first experimental batches of ligatures with nanoparticles for their subsequent introduction into the melt by the end of 2020, and in 2021 it is planned to receive experimental castings and protect intellectual property rights.

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