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MULTIFILAMENT MATERIAL

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A NEW MULTIFILAMENT 3-IN-1 MATERIAL AND ITS PRODUCTION PROCESS

Thanks to his new process, Jean-Jacques Blandin unlocks the secret of assembling a metallic glass and a metallic alloy. The result is a previously unheard-of combination of 3 properties: conductivity, strength and lightness.

» Description and functionalities

A composite material comprised of:
- a metallic glass based on zirconium
 optimal mechanical properties (compression, fatigue, flexion)
 better conductivity than ceramics
- a conventional metal alloy (give an example)

» Technology

Application of simultaneous joint deformation of the metallic glass and the alloy.
= Joint extrusion process making use of the great temperature deformation capacity of massive metallic glasses.

» Performances

- Conductivity increased

- Elasticity increased

- Easy implementation in an industrial environment

» Target

- High tension electric cables
- Connections

» Application areas

- Electricity distribution
- Precision connections
- Medical prostheses

» Laboratory

Laboratoire SIMAP - Sciences et Ingénierie des matériaux et Procédés - Réf. Fiche_techno_blandin_07042009_compositesVm

» Interview with Jean-Jacques BLANDIN

What is the motivation for your research work?

We had worked from an academic point of view on the mechanical properties, deformation capabilities and forming capabilities of metallic glasses. It appeared to us that a route towards facilitating their introduction in an industrial environment, in parallel with what could be done with massive materials, was to use them in combination with more conventional materials. In other words, making composites in which one component would be a metallic glass. From that point, we took advantage of the specific behaviour of these materials by developing process for producing composites of metallic glass and conventional materials.

How could a company use your innovation?

We wanted to adapt traditional processes for the production of these new materials. The types of  technique used are relatively conventional i.e. extrusion and pressing. A company with extrusion capabilities could very well use them for these materials.
We also investigated the effectiveness of the technique from the point of view of coatings to protect the surfaces of conventional materials. The idea is to widen the scope of what can be done by using these processes.

What is your working environment?

We have all the facilities required for forming, extrusion, rolling, pressing and characterisation. We can analyse the composition of the metallic glass and ensure the protection of the glass structure during that process.

5 people undertook the project. We also work with the Rhône-Alpes network (CRETA CNRS in Grenoble and INSA in Lyon)