News

News

Scientists are creating alloys that can withstand loads of space

Data: 2019-10-30
Views: 218

A team of the TSU Laboratory of High-Strength Crystal Physics is creating highly entropic alloys that differ in the unusual structure of the crystal lattice. They provide new materials with mechanical characteristics that make them suitable for use in the extreme conditions of space and the Arctic – at high and low temperatures, under load, and when exposed to radiation.


The object of the physicists’ study is the high-entropy alloys FeNiCoCr (+ Al, TiAl and Mo). Compounds with this chemical composition are used only in the polycrystalline state. The laboratory staff, led by its head Yury Chumlyakov, was the first in the world to grow single crystals and strengthen them with nanoparticles. At present, the physicists are studying the microstructure, deformation mechanisms, and mechanical properties of the single crystals obtained.


Such alloys usually consist of five or more components. All atoms have the same probability of being located in a specific lattice site. The presence of heterogeneous atoms of elements with different sizes leads to a significant distortion of the crystal lattice and difficulty in diffusion, which in turn ensures the growth of strength properties and their stability over a wide temperature range.


The unique structure provides the highly entropic alloy with a whole range of important operational characteristics, such as hardness, wear resistance, oxidation and corrosion resistance, and high thermal stability compared to traditional materials. These properties make it possible widespread use of the alloy in wind power plants in extreme temperature conditions below 120 K (-153 ° C) (cryogenic temperatures).


The research results of TSU physicists will serve as the scientific basis for the creation of new structural and functional materials based on wind farms adapted for space and suitable for the manufacture of structures in the Arctic. Thin films from HEAs can be used as protective coatings and thermal barriers.


According to the developers, the promising properties of high-entropy alloys make them potentially suitable for use as tools, molds, dies, mechanical parts, and furnaces that require high strength, heat resistance, and resistance to oxidation and wear. They also have excellent corrosion resistance and can be used in chemical plants and foundries and even as parts for pumps operating in seawater.


Via: https://www.miragenews.com

News / Recommended news More
2020 - 01 - 22
Heusler alloys are magnetic materials made from three different metals that are not magnetic individually. The alloys are used broadly for their magnetic and thermoelectric properties, and their ability to regain their original shape after being deformed, known as shape memory. Investigations by Tohoku University's advanced materials scientist An-Pang Tsai and colleagues now show that these materi...
2020 - 01 - 10
3D printed Titanium alloys under an electron microscope: sample on the left with large, elongated crystals was printed conventionally, while sample on the right with finer, shorter crystals was printed sitting on a ultrasonic generator. Credit: RMIT UniversityResearchers have used sound vibrations to shake metal alloy grains into tighter formation during 3-D printing.A study can have a signif...
2020 - 01 - 03
The ability to 3D print titanium-alloy objects certainly does open up some intriguing possibilities. That said, the finished items aren't always as strong as they could be. Now, new research suggests that adding copper to those alloys could make a big difference.Typically, when objects are being 3D printed out of titanium alloy, a laser is used to selectively melt a powder consisting of titan...
2019 - 12 - 27
Russian scientists have developed a new generation of extrahard alloys, which will be used for the creation of equipment for mining in the extreme conditions of the Arctic region, said Yevgeny Levashov, the project manager and a professor of the Russian National University of Science and Technology.According to Levashov, the new alloys were created as part of the state program for the development ...
Share:
Uniris Exhibition Shanghai Co., Ltd.
Shanghai Branch
Tel:4000 778 909
E-mail:irisexpo@163.com
  
Guangzhou Branch
Tel:020-8327 6389
E-mail:pmchina@unifair.com

CCEC CHINA official website
犀牛云提供企业云服务
Scan the QR code to visit the official website by phone