Tuesday, April 15, 2014

Microstructured materials as strong as steel yet less dense than water

Scientists in Germany have created a lightweight, high-quality material motivated by the system structure of bones and wood and the shell structure of bumblebees' honeycombs. Made utilizing 3d laser polymer printing consolidated with an artistic covering, the material is less thick than water however, in respect to its size, brags quality tantamount to high-execution steel or aluminum.


In spite of the fact that motivated by nature, the polymer microarchitecture prepared by a group at the Karlsruhe Institute of Technology (KIT) beats its characteristic partners as far as strength/density proportion. The underlying structure was processed utilizing a methodology of 3d laser lithography or polymer printing and solidifying.

Various structures were tried, including triangular, hexagonal and honeycomb. These were then covered by gas statement to give additional quality, with coatings of a fired material and alumina both tried. The polymer structure measured about 50 µm long, wide, and high, while different covering thicknesses were tried going from 10 nm to 200 nm.

It was found that a honeycomb polymer structure with an alumina covering of 50 nm yielded the most noteworthy security to thickness proportion. This microarchitecture outflanked the triangular and hexagonal partners processed and tried, while no extra quality was accomplished after a covering thickness of 50 nm of alumina was surpassed. This upgraded honeycomb structure fizzled at a weight of 28 kg/mm2, yet just had a thickness of 810 kg/m3, which the group says surpasses the stability/density degree of bones, huge steel or aluminum.

"The novel lightweight development materials take after the structure of a half-timbered house with level, vertical, and inclining struts," said study co-creator Jens Bauer. "Our bars, notwithstanding, are just 10 µm in size."

The group says microstructured materials are frequently utilized for protection or as stun absorbers, and that such open-pore materials might be utilized as channels within the synthetic business.

The group's outcomes have been distributed in the diary Proceedings of the National Academy of Science