Application of nanodiamond in the field of spacecraft

Researchers at the University of Campinas, Brazil, have recently produced nanodiamonds and other nanocarbon materials by targeting high-speed pulverization; this technology is expected to address structural damage caused by high-speed impact. The nano-carbon tubes were ballistically pulverized under different speed conditions to obtain nano-diamonds. It was found that this high-energy impact can cause the atomic bonds in the carbon nanotubes to rupture and recombine, thus forming a new structure. The paper co-author Sehmus Ozden introduced: Understanding how the atomic bonds of carbon nanotubes recombines can help us use this recombination method to develop ultra-light materials. This technology can be used in spacecraft and satellite materials to effectively fight high-speed projectiles. The collision. The research results were published in the journal of the American Chemical Society.
These high-speed projectiles, meteorites and orbital debris, are devastating to spacecraft and satellites. The use of lightweight flexible materials can greatly reduce the damage caused by collisions. Carbon nanotubes are the best choice for developing this new material.
The staff loaded the multi-layer carbon nanotubes into a spherical bullet, and then used a two-stage light gas gun to shoot at the target of the aluminum; analyzed the impact shock at three different speeds.
In the low-speed collision test of 3.9 km / s, the structure of the carbon nanotubes remained unchanged; when the speed was increased to 5.2 km / s, there was still a part of the carbon nanotube structure remained unchanged; when the speed was increased to 6.9 km / sec, The carbon nanotube structure is basically pulverized, and the original structure has changed; at this time, most of the carbon nanotubes are split into strips.
Collaborator Chandra Sekhar Tiwary found that a few surviving carbon nanotubes and nanoribbons were combined, as shown in the TEM image below. Tiwary introduced that previous studies have found that carbon nanotubes can form graphene bands at very high speeds; we have been hoping to get carbon nanocomposites, but at the same time we can find the formation of nanodiamonds is really surprising. According to Ajayan's analysis, the orientation of nanotubes, the relationship between nanotubes and aluminum, and the number of layers and emission speed of nanotubes have an important impact on the formation of the final material structure.
Teamworker Leonardo Machado commented that this research opens up new avenues for the fabrication of nanomaterials by high-speed impact technology and will play a pivotal role in the future application of spacecraft materials and satellite materials. (Compile: China Superhard Materials Network)

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