Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Metallic foams

04.12.2003


INASMET Technological Centre is working on a project to develop metallic foams. Metal foams and cellular metals have become one the preferred research fields in mew materials in recent times. Given their special structure and extreme lightness, they have enormous potential for use in a never-ending list of applications in diverse industrial sectors.



Metallic foams are, as their name indicates, metallic materials with a porous structure. They can take either the form an open structure of interconnected pores, similar to a bath sponge or a closed structure of pores not connected to each other.

They have very low density (between 0.03-0.2 g/cc) at the same time showing some of the properties of the metal of which they are made up, together with other characteristics due to its particular structure. Thus, they are materials with a combination of very special physicochemical and mechanical properties, to such an extent that the series of properties they show is not currently covered by other materials, at the same time as they improve their respective applications.


In fact, the term best suited to define this type of materials would be ’multifuntionality’. They can be used in structural applications (given their excellent rigidity/weight ratio, durability, etc.) or in energy absorption of impacts and explosions (due to their capacity for isotropic absorption of energy at low and constant stress). They can also be used as noise and vibration absorbers and heat interchangers, as a basis for catalisers, etc.

Manufacture of closed-pore metal foams is almost exclusively centred on aluminium foams, while other alloys need to be researched and developed further (steel, copper, etc). There are a number of manufacturing processes and, using one or another method, sheets of foam material or complex shapes can be obtained.

Sheet material is used in a number of applications: reducing noise on roads and bridges, fire protection in buildings, impact-resisting structures for automobiles, etc. A second method enables the manufacture of complex shapes of metal foam with a solid external ’skin’. This enables the production of an endless array of applications with complex geometrical shapes. An example of the application of sandwich-type parts is in the majority of impact-resisting structures used in automobiles for improved passive safety (crash-boxes, doors, roofs), as well as ultralight structures.

Unlike closed-pore metal foams, the manufacture of open-pore foams is mainly based on the use of filler material and polymeric moulds the shapes of which are reproduced in metal, with the subsequent elimination of the mould. These types of structures can be made in almost any type of metal (Al, Cu, Mg, Fe, steel, etc.), both by casting and by processes of pulvimetallurgy, chemical deposition, etc.

In conclusion, metal foams can be seen as a future technology with high growth prospects in industrial use in the short- and medium term, given that they respond perfectly to the exigencies from a variety of markets: reducing weight in structures, safety in transport, noise reduction, yield enhancement in industrial processes, etc. All this at a competitive cost, which contributes substantially to business efficiency and competitiveness.

Contact :
Haridian Cubillo Oliva
INASMET
hcubillo@inasmet.es
(+34) 943 003700

Garazi Andonegi | Basque research
Further information:
http://www.basqueresearch.com/berria_irakurri.asp?Gelaxka=1_1&Berri_Kod=366&hizk=I
http://www.inasmet.es

More articles from Materials Sciences:

nachricht Beyond conventional solution-process for 2-D heterostructure
22.06.2018 | Science China Press

nachricht Graphene assembled film shows higher thermal conductivity than graphite film
22.06.2018 | Chalmers University of Technology

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>