COMPOT · Composites magnetic shape memory Alloy- Polymer for Tunable damping
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2007-03-08 → 2009-03-07
- EU contribution
- €137,581
- Participants
- 1
- Scheme
- IIF
Lines connect the coordinator with its partners.
Results in brief
Final Activity Report Summary - COMPOT (Composites magnetic shape memory Alloy- Polymer for Tunable damping)
Ferromagnetic Shape Memory Alloy (FSAM)/polymer composites are materials that show a very large capacity to dissipate vibration, or absorve impacts. They can do so because the FSMA particles that make up the composites can deform pseudo-plastically. The research carried out on these materials gained insight on the microscopy phenomena involved during the cyclic deformation of the composites. Work was done on understanding the role of the polymeric matrix on the response of the composite, and on finding a polymer that would maximize the response of the composite, based on its ability to transfer the stress applied to the composite to the metal particles found within it. To study the properties of the metal particles in the composites magnetic measurements and neutron diffraction techniques were used. The processing of the material while curing the matrix also played an important role on the final results obtained since a magnetic field was applied during the curing to ensure that certain planes of atoms within the metal particles had a specific orientation relative to the direction of the magnetic field applied during the curing. The composites also showed that they could absorve a large fraction of the energy of an impact. This is an important application of these materials, since it means that they could be used in applications related to the protection of persons during crashes, in addition to being useful in reducing vibrations due to machinery.
Data: CORDIS, © European Union
Project objective
Composites of Ferro Magnetic Shape Memory (FSMA) alloys and polymers will be investigated in order to obtain high damping coefficient materials that can be tuned by the application of an external magnetic field. Twin boundaries motion in the FSMA dissipate s a large amount of mechanical energy, that adds to the inherent loss of the matrix.Work on NiMnGa/ Polymer composites was the subject of the PhD of the applicant. It has been shown that twin boundaries are mobile and that they are responsible for the large losses observed, but no systematic analyses of the frequency dependence of the loss, the effect of the matrix stiffness and the effect of a magnetic field on the loss have been performed.The research program will include FMSA and Polymer synthesis and characterization, preparation and processing of the Composites, as well as characterization and test of their magneto-mechanical properties. Neutron diffraction performed in large European facilities will be used to quantify, in-situ, the motion of twin boundaries as a load or a magnetic field is applied.Finite element analysis will be used to model the stress distribution in the composites. The multidisciplinary character of the project call for collaboration of polymer chemists, metallurgy and magnetic materials scientists, neutron diffraction experts and others.The possibility to apply a magnetic field to tune both the elastic constants and damping ability of the composites, object of this investigation, is a clear added value with respect to both traditional new and highly effective damping materials.Finally, training of the applicant and establishment of a close collaboration with European partners (among the current contacts of the host group) will improve the applicant's ability for performing research and will also strength the relationship between European laboratories and the MIT (were the applicant performed his PhD) and Mexico from where he is a national.
Original text from CORDIS.
Participants
- UNIVERSIDAD DEL PAIS VASCO / EUSKAL HERRIKO UNIBERTSITATEA · LEIOACoordinatorSpain
Links
Data: CORDIS, © European Union