Tuesday , October 4 2022

Short Tiny High Speed ​​Speed ​​Speed ​​and Hole in Space Station, Study Shows



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We know that even grains of dust or small droplets can damage a hard metal surface if the particle collects a very high speed when it breaks into it.

But so far there has been a problem showing how or why that damage occurs. That's because the speed must be very free, and the scales are extremely small.

Researchers now by MIT have developed fast enough cameras and have enough compression to capture at that time in detail – and have learned that these speeds are so intense, the effect is in truth in part melting the face.

This was "unexpected," based on previous research on erosion, the scientists said.

Microscopic particles of speed can be quite useful, and the way in which they erode surfaces is not bad. Sand excavation is one such type of application, or using coating.

But they can also be dangerous – such as ISS-bombing micrometeorites, for example, or particles that are carried by strong winds hitting wind turbines.

"We want to understand the mechanisms and precise conditions when these erosion processes can take place," explained Mostafa Mostafa Hassani-Gangaraj from MIT.

So he and his team came with a series of experiments to discover, using a microparticle impact hose developed in MIT. With a frame of up to 100 million FPS, the tested can record on the extremely high speeds needed.

A canned surface was then installed, and a laser used to heat another piece of tin. This evaporates the surface of the substrate, and sprays and accelerates microscopic particles of a tin in the process. This resulted in a tin particle of about 10 micrometers in diameter – about 0.01 millimeters – tightening the canned surface at a speed of up to a kilometer per second (2,237 miles per hour).

They also used a laser to illuminate these effects to see clearly what was happening.

This allowed them to see, for the first time, the mechanism that produces the damage, rather than relying on the surface inspection after the effect.

And there, in the video, you can clearly see the throwing material triggering off-site impact.

width effect erosionElectronic micrography scans one of the effects of a 10μm particle at 1kps. (Hassani-Gangaraj et al.)

This information is really invaluable. It can help to improve, for example, those industrial processes that use high-speed microparticles, where the probability received, according to the researchers, is that higher speeds achieve better outcomes.

These results show that this is not always the case – crack it too high and you can melt things without intending to do so.

This can also help us to understand how microparticles can harm turbines, spacecraft and oil pipelines. And what about the bad robots on Mars, giving weather on the unusual dust storms. After providing this new information, engineers could develop more erotic-resistant applications for space and terrestrial applications.

Obviously, a little more research is doing. The team only used a tin, and at a direct impact angle. There are likely to be slightly different effects for different materials – with different levels of hardness or hardness, and different melting points (tin are quite low), as well as different impact angles.

But this first step, when demonstrating that the test and experimental setting is used to collect and analyze that little impact, is very impressive.

"We can extend this to every situation where erosion is important," said the MIT engineer, David Veysset.

The team's research has published in the magazine Nature Communication.

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