Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Nano-structured parts

Abstract:
Materials with a nanoparticle structure are stronger and harder than materials made of larger particles. A new manufacturing technique ensures that such microcrystalline structures remain intact when being processed.

Nano-structured parts

Germany | Posted on February 3rd, 2009



Aluminum is light but also bends easily. However, if it has a nanometer structure, it features quite different properties: The material is much stronger and firmer, and this makes it ideal for engine screws, which have to withstand high temperatures. It is also eminently suitable for making lightweight parts, for the stronger the material, the thinner the sheets for the components can be made. The material's properties are mainly due to the tiny size of its crystals. These are much smaller than those in conventional materials, hence the designation "microcrystalline structures".

One of the challenges posed by such nano materials lies in processing them to make tools or components. Pressing or joining requires that the material be heated. This causes the crystals to grow, so the structures become larger. In short, the material loses its "nano properties" as it heats up. Researchers at the Fraunhofer Institute for Manufacturing Engineering and Applied Materials Research IFAM in Dresden have risen to the challenge. "Our goal is to preserve the material's microcrystalline structure throughout the entire component manufacturing process," states IFAM project manager Dr. Ronny Leuschner. To this end, the researchers have set up a special technology chain for manufacturing nano-structured aluminum and other materials. "First of all, we produce a special aluminum alloy," says Leuschner. "The metal melt has to be cooled very rapidly, so we virtually freeze it." This is done using the "melt spinning" technique: A specially developed spraying device pours the melt onto a water-cooled rotating roller, producing uniform strips or "flakes" no more than a few micrometers thick. As soon as it hits the roller, the melt rapidly loses heat and the flakes solidify at top speed. The advantage of this system is that it can handle several kilograms of material and withstand temperatures of more than 1700 degrees Celsius. "Once they have solidified, the flakes need to be compacted and pressed into the desired shape," explains Leuschner. During this step, too, their microcrystalline structures must remain intact. The method the researchers use in this case is spark plasma sintering: High-frequency current pulses inside the press compact the material in a very short space of time so that the fine microstructures are preserved. Applications for these nano materials range from lightweight aluminum parts with greater strength and improved wear and corrosion resistance, to hydrogen storage, energy production with thermoelectric materials, and electrical engineering.

####

For more information, please click here

Contacts:
Dr.-Ing. Ronny Leuschner
Phone: +49 351 2537-397
Fax: +49 351 2554-492
Fraunhofer Institute for Manufacturing Technology and Applied Materials Research
IFAM-DD
Winterbergstr. 28
01277 Dresden

Copyright © Fraunhofer-Gesellschaft

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Harris & Harris Group to Host Conference Call on Second-Quarter 2014 Financial Results on August 15, 2014 July 23rd, 2014

UCF Nanotech Spinout Developing Revolutionary Battery Technology: Power the Next Generation of Electronics with Carbon July 23rd, 2014

Deadline Announced for Registration in 7th Int'l Nanotechnology Festival in Iran July 23rd, 2014

A Crystal Wedding in the Nanocosmos July 23rd, 2014

Discoveries

UCF Nanotech Spinout Developing Revolutionary Battery Technology: Power the Next Generation of Electronics with Carbon July 23rd, 2014

A Crystal Wedding in the Nanocosmos July 23rd, 2014

Nano-sized Chip "Sniffs Out" Explosives Far Better than Trained Dogs: TAU researcher's groundbreaking sensor detects miniscule concentrations of hazardous materials in the air July 23rd, 2014

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Materials/Metamaterials

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Steam from the sun: New spongelike structure converts solar energy into steam July 21st, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Announcements

Harris & Harris Group to Host Conference Call on Second-Quarter 2014 Financial Results on August 15, 2014 July 23rd, 2014

UCF Nanotech Spinout Developing Revolutionary Battery Technology: Power the Next Generation of Electronics with Carbon July 23rd, 2014

Deadline Announced for Registration in 7th Int'l Nanotechnology Festival in Iran July 23rd, 2014

A Crystal Wedding in the Nanocosmos July 23rd, 2014

Energy

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices July 21st, 2014

Steam from the sun: New spongelike structure converts solar energy into steam July 21st, 2014

3-D nanostructure could benefit nanoelectronics, gas storage: Rice U. researchers predict functional advantages of 3-D boron nitride July 15th, 2014

Nanotechnology that will impact the Security & Defense sectors to be discussed at NanoSD2014 conference July 8th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE