Connect with us
MAI scientists have created a new heat resistant composite for future MAI scientists have created a new heat resistant composite for future

News

MAI scientists have created a new heat-resistant composite for future spacecraft

Published

on

The scientific group of NIO-9 MAI creates a particularly heat-resistant composite material capable of withstanding temperatures up to 2000 °C. It will be in demand when creating space planes like Buran or the Space Shuttle. Such devices will be able to deliver people and cargo to orbital stations, as well as launch spacecraft into low Earth orbit.

MAI scientists have created a new heat-resistant composite for future spacecraft

Such space planes must be reusable. And if the launch into orbit is a relatively simple matter, then when returning to the skin, a large load is placed. Friction against the atmosphere heats it up to enormous temperatures.

Previous high-temperature composite materials used in aircraft construction consisted of carbon fibers and a matrix based on either special carbon or silicon carbide. However, the first of them cannot work in air due to the oxidation of carbon, which begins at temperatures of 400–450 °C and increases with their growth. The latter are operable up to 1700–1750 °C, but their resource is very low due to the same oxidation process.

To protect against destruction, a heat-resistant protective coating is usually additionally developed for each specific material. On the Buran, a special vitreous film was used for this, and the spacecraft could withstand temperatures up to 1600 ° C.

MAI scientists have created a new heat-resistant composite for future spacecraft

Our research team came up with the idea of ​​creating a carbon-ceramic composite material that does not contain silicon-based compounds. Carbides and borides of a number of metals, such as hafnium, niobium, and titanium, are used as a matrix that holds carbon fibers together. During high-temperature oxidation of such composites, a protective layer will form on the surface. It will reduce the rate of oxidation of carbon fibers“, – said a member of the scientific group Igor Sukmanov.

The prototypes have already passed the first fire gas-dynamic tests. “Based on the test results, we will make adjustments to the phase composition of the composite and the modes of technological processes for its production. New, already adjusted samples will also be tested“, – said the head of the scientific group, associate professor of the department 903 “Promising materials and technologies for aerospace purposes” of the MAI Alexei Astapov.

However, in reality, the new composite will not be applied soon. According to the head of the laboratory “Materials for use in extreme conditions” of the Competence Center of the NTI “Digital Materials Science” MSTU. Bauman Vyacheslav Seleznev, now the certification of materials that can be used in space takes up to 10 years.

Click to comment

Leave a Reply

Your email address will not be published.

News

Hyundai showed the concept of the K808 armored personnel carrier with a hydrogen power plant. The prototype is expected to be released in 2026.

Published

on

Hyundai showed the concept of the K808 armored personnel carrier

Hyundai Rotem, Hyundai’s military vehicle division, has announced a new generation of armored personnel carriers and tanks at DX Korea 2022. Their feature will be the use of hydrogen power plants and artificial intelligence systems.

Hyundai showed the concept of the K808 armored personnel carrier with a hydrogen power plant.  The prototype is expected to be released in 2026.

The new armored personnel carrier bears the symbol NGWAV (Next-generation Wheeled Armored Vehicle, new generation armored personnel carrier), the tank – NGMBT (Next-generation Main Battle Tank, main battle tank of the new generation). They will replace, respectively, the K808 armored personnel carrier and the K2 MBT tank, which are in service with the army of the Republic of Korea.

Hyundai showed the concept of the K808 armored personnel carrier with a hydrogen power plant.  The prototype is expected to be released in 2026.

Hyundai Rotem notes that the novelties are being developed taking into account modern technologies – they will use AI, a fuel (hydrogen) cell power plant, an autonomous driving system, and next-generation weapons.

NGWAV will be based on the current K808 platform with a hydrogen power plant. The project started this year, the prototype should appear in 2026.

The company takes ten years to create NGWAV and NGMBT, while some characteristics of the promising armored personnel carrier are already known. Its weight will not exceed 30 tons, the maximum speed will be 100 km/h, the cruising range is 600 km. However, there may be some changes in terms of power reserve, since it all depends on how many fuel cells will be placed on board. Also, NGWAV will receive an uninhabited tower, a 40-mm cannon and a rocket launcher.

Continue Reading

Phones

The Redmi smartphone costs just over $100. Redmi A1+ render and specs

Published

on

The Redmi smartphone costs just over 100 Redmi A1 render

The source published details about the Redmi A1 + smartphone. As the name suggests, this model will be an improved version of the previously released Redmi A1. And there will only be one improvement.

The Redmi smartphone costs just over $100.  Redmi A1+ render and specs

This is a fingerprint scanner. Redmi A1 does not have it, while Redmi A1+ has the corresponding sensor on the back panel. There will be no more differences between Redmi A1 and Redmi A1 +.

The Redmi smartphone costs just over $100.  Redmi A1+ render and specs

Redmi A1 + will receive a screen with a diagonal of 6.52 inches and HD + resolution, SoC MediaTek Helio A22, 2 GB of RAM and 32 GB of flash memory (in the basic version), a 5-megapixel front camera and an 8-megapixel main camera (there will be a second image sensor , but its resolution is not reported), a 5000 mAh battery with support for 10 W charging. The device will run pure Android version 12. Other features include a standard headphone jack and a microUSB port.

The Redmi smartphone costs just over $100.  Redmi A1+ render and specs

The exact cost of Redmi A1 + is not called, but the source logically explains that the inclusion of a fingerprint scanner in the design will have a minimal impact on the price. If Redmi A1 is priced at 100 euros, then Redmi A1 + will be slightly more expensive than 100 euros (or $ 100).

Continue Reading

News

Is there a meteorite? Chinese scientists believe that dinosaurs began to die out before the meteorite fell

Published

on

Is there a meteorite Chinese scientists believe that dinosaurs began

Researchers from the China University of Geosciences, after examining more than 1,000 eggshell remains, suggested that dinosaurs were on the path to extinction millions of years before the meteorite fell.

Is there a meteorite?  Chinese scientists believe that dinosaurs began to die out before the meteorite fell

Fossilized eggshells and whole eggs of dinosaurs that lived two million years before the meteorite hit have been discovered in central China. Despite the huge number of remains, they belonged to only two different taxa – hadrosaurids and oviraptors. At the same time, the number of species has been constantly decreasing for all two million years. This may indicate that biodiversity was already extremely low then.

The decline in biodiversity has weakened the collective ability of dinosaurs to adapt after the impact of the asteroid Chicxulub that fell in Mexico. This means that the prerequisites for the mass extinction of dinosaurs were formed millions of years before the meteorite fell.

Low species diversity in the same period was also characteristic of North America, i.e., the decrease in diversity took place globally. Causes could be volcanic eruptions and climate change. Some studies suggest that dinosaur diversity may have begun to decline 10 million years before the meteorite impact. Opponents of this hypothesis believe that less than 20% of the dinosaurs were in decline before the meteorite fell, so it is impossible to explain their extinction only by “earthly” reasons. The authors emphasize that further research is needed on this topic.

Continue Reading

Most Popular