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Construction of a force sensor using Fe-Ga and Fe-Al doped with boron

Grant number: 11/21258-0
Support type:Regular Research Grants
Duration: March 01, 2012 - February 28, 2014
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Cristina Bormio Nunes
Grantee:Cristina Bormio Nunes
Home Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil


This project proposes the development of a force sensor using the high mmagnetostrictive Fe-19Ga magnetic alloy. The samples to be tested will be initially manufactured by fusing arc furnace with non-consumable tungsten electrode under argon atmosphere using cooled copper crucible. The alloy Fe-19Ga will be build with different geometric shapes to study the deformation response and magnetization under static and dynamic conditions. Due to its mechanical properties, this alloy has advantages in the construction of a force sensor with respect to conventional sensors, enabling the construction of a robust sensor that can be used in conditions where forces constants and variables are applied. For the construction of a sensor an assembly will be built by adapting the equipments already existent in the laboratory. For the first year of the proposal is not necessary to purchase new equipments. With the existing equipments is possible to perform the proposed experiments. For the second year will be required to purchase a fluximeter, an actuator, a Hall sensor and other spares, for adjusting the tests to be performed in the dynamic testing machine MTS. This machine is usually used for mechanical testing of materials and is already exists in the Department of Materials Engineering of EEL-USP. Besides them, we also intend to test a commercial GALFENOL alloy, so we can compare the results of the material that we will produce. To purchase the complementary infrastructure, the equipment and accessories, a proposal will be submitted to FAPESP. Moreover, in a project recently completed with funding from FAPESP (2008/07463-8), the magnetostriction of the alloy Fe-Al-B was studied and a significant increase of the magnetostriction of the alloy Fe-20% Al +3% B (in atomic %) was achieved so that the value obtained is comparable to Fe-Ga. It is also intended in this study to test this material to be used in the force sensor. (AU)

Matéria(s) publicada(s) na Agência FAPESP sobre o auxílio:
Specialists discuss innovations in magnetic materials 
Specialists discuss innovations in magnetic materials 

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BORMIO-NUNES, CRISTINA; HUBERT, OLIVIER. Piezomagnetic behavior of Fe-Al-B alloys. Journal of Magnetism and Magnetic Materials, v. 393, p. 404-418, NOV 1 2015. Web of Science Citations: 18.
DIAS, MATEUS B. S.; BORMIO-NUNES, CRISTINA; PACHECO, CLARA JOHANNA; MACHADO, VAGNER DE OLIVEIRA; HUBERT, OLIVIER. Magnetomechanical behavior of a directly solidified Fe-Al-B alloy. Smart Materials and Structures, v. 24, n. 10 OCT 2015. Web of Science Citations: 5.
V. L. O. BRITO; S. A. CUNHA; F. F. ARAÚJO; J. P. B. MACHADO; M. R. SILVA; C. B. NUNES. Processing and characterization of a Ni-Co ferrite for sensor applications. Cerâmica, v. 61, n. 359, p. 341-349, Set. 2015.
BORMIO-NUNES, CRISTINA; DIAS, MATEUS BOTANI; GHIVELDER, LUIS. High magnetostriction of the polycrystalline alloy (Fe0.8Al0.2)(97)B-3. Journal of Alloys and Compounds, v. 574, p. 467-471, OCT 15 2013. Web of Science Citations: 11.

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