Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

International researchers discuss at INM how the mechanics of materials changes with size

27.03.2012
An electric cable can also be installed around edges and corners in houses due to the metal structure in little: The wires consist of copper grains, which can be deformed.

Thus, the wire remains intact even when bent. Only when the copper grains are smaller than one thousandth of a millimeter, the properties change and therefore the metal's behavior:


PDMS Pillars with Nanoindenter
INM

It becomes harder and breaks faster. During the international workshop Nanobruecken II at INM – Leibniz Institute for New Materials on 22 and 23 March 2012, materials researchers from Europe discussed why such mechanical properties of a material change in smallest dimensions.

"We know that materials in size ranges under one thousandth of a millimeter behave mechanically in a different way from larger units", says Roland Bennewitz, head of the program division "Nanotribology". "It is not completely understood yet, why and how materials change their properties in smaller units. If our measurements allow us to explain the determining factors behind it, we will be able to tailor the mechanical behavior of materials in the future", explained the physicist. A certain hardness, viscosity, deformability and even combinations of these properties could then be precisely tailored. New concepts for hardened metal surfaces or sliding rubber seals are imaginable in the future.

In order to understand the phenomena behind it, the researchers use special analytical methods. The so-called nanoindenter has a sharp tip, which is pressed into the surface of a material sample, examining its deformability. At INM, the researchers are able to produce samples with microscopic dimensions. By the so-called "ion-etching" very small pillars with different diameters are produced, which are scanned by a sharp tip.

Important parameters are the tip's depth of indentation, the energy needed, or the way the pillars are crushed during the scanning. The whole process is done in a dimension of only a few millionths of millimeters. "For the measurements, we use a special nanoindenter developed by Hysitron, whose measuring possibilities were tailored especially to our needs", the materials expert explains. Usually, hard probes, i.e. metals, ceramic or even nacre, can be examined with such equipment. But it is no problem to also examine smooth probes, such as plastics, with the specially developed equipment.

For the scientific discussions, INM invited international researchers with their special knowhow. 60 researchers from Europe took part in the two-day congress Nanobruecken II. Nanobruecken is taking place at INM for the second time. In workshops, the company Hysitron presents technical innovations of their nanoindenters.

Contact:
Professor Dr. Roland Bennewitz
INM – Leibniz-Institut für Neue Materialien gGmbH
Programmbereichsleiter Nanotribologie
Tel.: +49 (0)681-9300-213
E-mail: roland.bennewitz@inm-gmbh.de

INM is focused on the research and development of materials – for today, tomorrow and the future. Chemists, physicists, biologists, materials and engineering scientists shape the work at INM. From molecule to pilot production, they follow three essential questions: Which material properties are new, how can they be investigated and how can they be used for industrial and true-to-life applications in the future?

INM – Leibniz Institute for New Materials, situated in Saarbrücken/Germany, is an internationally leading centre for materials research. It is a scientific partner to national and international institutes and a provider of research and development for companies throughout the world. INM is an institute of the Scientific Association Gottfried Wilhelm Leibniz and employs around 190 collaborators. Its main research fields are Chemical Nanotechnology, Interface Materials, and Materials in Biology.

Dr. Carola Jung | idw
Further information:
http://www.inm-gmbh.de
http://www.wgl.de

More articles from Materials Sciences:

nachricht Electron tomography technique leads to 3-D reconstructions at the nanoscale
24.05.2018 | The Optical Society

nachricht These could revolutionize the world
24.05.2018 | Vanderbilt University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>