Large energy absorption in Ni-Mn-Ga/polymer composites

Journal Article · Sun May 15 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1857653· OSTI ID:20711668

Feuchtwanger, Jorge; Richard, Marc L; Tang, Yun J; Berkowitz, Ami E; O'Handley, Robert C; Allen, Samuel M ^[1]

---

1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Ferromagnetic shape memory alloys can respond to a magnetic field or applied stress by the motion of twin boundaries and hence they show large hysteresis or energy loss. Ni-Mn-Ga particles made by spark erosion have been dispersed and oriented in a polymer matrix to form pseudo 3:1 composites which are studied under applied stress. Loss ratios have been determined from the stress-strain data. The loss ratios of the composites range from 63% to 67% compared to only about 17% for the pure, unfilled polymer samples.

• OSTI ID: 20711668
• Journal Information: Journal of Applied Physics, Vol. 97, Issue 10; Conference: 49. annual conference on magnetism and magnetic materials, Jacksonville, FL (United States), 7-11 Nov 2004; Other Information: DOI: 10.1063/1.1857653; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
ENERGY ABSORPTION
EROSION
FERROMAGNETIC MATERIALS
GALLIUM ALLOYS
HYSTERESIS
MAGNETIC FIELDS
MANGANESE ALLOYS
NICKEL ALLOYS
PARTICLES
POLYMERS
REINFORCED MATERIALS
SHAPE MEMORY EFFECT
STRAINS
STRESSES
TERNARY ALLOY SYSTEMS