Villari effect in silicone/FeGa composites

This paper presents the results of the Villari effect study in FeGa magnetorheological composites with very low stresses. The composites consist of a silicone matrix and Fe75Ga25 powder of size ranging from 50 to 100  μ m . Two types of composites, one is with 45 wt% and the other one with 30 wt% of...

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Bibliographic Details
Published inBulletin of materials science Vol. 42; no. 5; p. 238
Main Authors Riesgo, G, Elbaile, L, Carrizo, J, García, G, Crespo, R D, García, M A, Torres, Y, García, J A
Format Journal Article
LanguageEnglish
Published Bangalore, India Indian Academy of Sciences 01.10.2019
Springer Nature B.V
Subjects
Chemistry and Materials Science
Composite materials
Curing
Engineering
Load
Magnetic fields
Materials Science
Original Research
Particle size
Silicones
Stainless steel
FeGa powder
magnetostrictive composites
Villari effect
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Summary:This paper presents the results of the Villari effect study in FeGa magnetorheological composites with very low stresses. The composites consist of a silicone matrix and Fe75Ga25 powder of size ranging from 50 to 100  μ m . Two types of composites, one is with 45 wt% and the other one with 30 wt% of Fe75Ga25 powder have been manufactured. The Villari effect has been measured in both samples as-manufactured and in those in which a 1 T magnetic field has been applied after curing. The results indicate that the composites with an applied field of 1 T after curing show the greatest Villari signal even without any applied magnetic field. This fact allows a design of a low-cost force sensor and high performance. A simple model, based on the change in the cross-section of the composite, has been developed to explain the results obtained.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-019-1926-x