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By sandwiching tiny but super-tough carbon nanotubes between layers of polymer, researchers have created a revolutionary material that is six times stronger than conventional carbon-fibre composites and as hard as some ultrahard ceramic materials used in engineering1.
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The final composites contain 50% nanotubes. Tests indicate that they are about as strong as materials such as silicon carbide and tantalum carbide, which are used to make super-strong components for cutting-tools, jet engines and aerospace applications.
Though laborious, the dipping method is cheap-so it wouldn't be hard to do on an industrial scale. But carbon nanotubes are still expensive to produce, and several teams are looking for production methods that would be viable on a commercial scale.
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