Monday , April 19 2021

Tiny High-Speed ​​Particle Effectively Strikes Hole in Space Station, Study Exposures



We know that even water dust or tiny drop can damage hard metal surfaces, if the item collects high speed when it crashes.

But so far there has been a problem to run out like or why this defect occurs. That is, because the speed must be really fresh, and the scales really incredibly little.

Now MIT's researchers have developed cameras quite quickly and enough enough to capture this moment of impact in detail – and learned that these speeds are so intense, the effect is actually melting the surface

This was "predictable", based on previous exploration of erosion, the scientists said.

Higher microscopic particles can really be quite useful, and the way when they drain surfaces is not bad. Sandblasting is one such application, or applying slices.

But they can also be dangerous – such as micrometeorites, bombing the ISS, for example, or particles borne by strong winds that affect winds.

"We want to understand the mechanisms and proper conditions, when these crucial processes can occur," explained Mitafa engineer Mostafa Hassani-Gangara.

So he and his team came with a series of experiments to find out, using micropartic effects developed at MIT. With a framework of up to 100 million FPS, the test can register at the incredibly high speeds required.

They then set up a tin surface and used a laser to heat another tin. This evaporates the substrate-surface, and ejects and accelerates microscopic components of tin in the process. This caused tanned components around 10 microns per diameter – about 0.01 millimeters – knocking the tin surface at speeds up to a kilometer per second (2,237 miles per hour).

They also used lasers to illuminate these effects for a clear point of view on what happened.

This allowed them to see, for the first time, the device that produces the damage, instead of relying on an examination of the surface after the impact.

And there, in the video, you can clearly see dumped material by turning off the effective site.

Impact erosion semElectronic microfilm of one of the effects of 10 μm particles at 1kps. (Hassani-Gangaraj et al.)

This information is really incredibly valuable. It can help improve, for example, those industrial processes that use high-speed microparts, where the reasonableness of the wisdom, according to the researchers, is that higher speeds achieve better results.

These results show that this is not always – it crawls too tall and you can melting without intending to do it.

This can also help us to understand how microparticles can damage turbines, and spaceships, and oil tubes. And about the poor robots on Mars, waking up these crazy dusty storms. Equipped with this new knowledge, engineers could develop more erosion-resistant materials, and for space and space applications.

Obviously there is a little more research. The team only used a tin, and at a direct effective angle. Probably these will be slightly different effects for different materials – with different levels of hardness or difficulty, and different melting points (tin are quite low), and also different effective angles.

But this first step, showing that the tested and experimental set can be used to capture and analyze this moment of effect, is very impressive.

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

The team's investigation was published in the magazine Natural Communications.


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