Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New, intelligent materials for use in mechanical actuators

29.01.2004


A research team at the Department of Physics at the Public University of Navarre are developing new, “intelligent” materials which have the capacity for changing shape when a magnetic field is applied to them. These materials may be used for the generation of ultrasonic signals, in the manufacture of loudspeakers and sonars or in actuators, amongst other applications. The project is a three-year one.



Specifically, the group at the Public University of Navarre is working on the optimisation of materials which were discovered at the beginning of the nineties: metal alloys having a ferromagnetic shape memory (FSMA). These alloys have the ability to change shape under mechanical pressure, in a magnetic field or with temperature variation, and to return, in a reversible manner, to its original shape when the stimulus ceases or is removed.

Magnetic modification


The principal use for these alloys having a ferromagnetic shape memory is in the manufacture of actuators, those devices which, on the application of a magnetic field, modify their dimensions in order to carry out operations. The advantage of these devices is that the operations in question can be controlled remotely using magnetic fields, without the need to resort to manual contact. As a result of the modification of the dimensions, the actuator can press a button or carry out any other mechanical operation in an industrial process.

Moreover, these metal alloys with ferromagnetic shape memory have a capacity for changing shape much greater than that of other metals, thereby providing us with an alternative to the current piezoelectric actuators, currently the most commonly used in industrial processes.

Beyond this use, the field of application of this type of alloy stretches from the generation of ultrasonic signals (for ultrasonic cleaning or ultrasonic transducers such as those used in ecographys...), to the application of a constant force (lineal force engines, positioners...), and taking in the cores of speaker and sonar devices, vibration dampers and a whole series of devices based on piezoelectric and magnetostrictor materials.

Development of new alloys

The aim of this research project is to find new alloys having a ferromagnetic shape memory, introducing materials such as aluminium, tin, cobalt, nickel or gallium.

To achieve this, in the first place, the Public University of Navarre is studying the vibrational behaviour and the elastic constants of monocrystalline alloys, for the subsequent application thereof to the more abundant polycrystalline alloys.

The monocrystal alloys are ordered structures, perfect crystallographic networks which enable the study of their properties with ease. Nevertheless, monocrystals involve a costly and demanding manufacture process so it is the polycrystals that are more frequent in commercial applications.

Garazi Andonegi | Basque research
Further information:
http://www.basqueresearch.com

More articles from Materials Sciences:

nachricht New concept for structural colors
18.05.2018 | Technische Universität Hamburg-Harburg

nachricht Saarbrücken mathematicians study the cooling of heavy plate from Dillingen
17.05.2018 | Universität des Saarlandes

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

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...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
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

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>