Journal
ADDITIVE MANUFACTURING
Volume 37, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.addma.2020.101560
Keywords
Magnetic shape memory alloy; Additive manufacturing; Martensitic transformation; Sintering; Binder jetting; Powder bed; Magnetocaloric effect; Ni-Mn(Cu)-Ga alloy
Funding
- National Defense Science and Engineering Graduate (NDSEG) Fellowship Program - Air Force Research Laboratory (AFRL)
- Office of Naval Research (ONR)
- Army Research Office (ARO)
- NSF [1727676]
- Spanish Ministry of Science and Innovation [RTI2018-094683-B-C53]
- Basque Government Department of Education [IT1245-19]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1727676] Funding Source: National Science Foundation
Ask authors/readers for more resources
Magnetocaloric (MC) materials are a focus for solid state magnetic refrigeration, with additive manufacturing showing promise for fabrication. The study printed and sintered a Ni49.5Mn19.1Cu6.6Ga24.8 alloy, demonstrating excellent magnetocaloric characteristics.
Magnetocaloric (MC) materials have gained traction in the research and industry communities for their prospects in solid state magnetic refrigeration. Important to the commercialization of MC materials are: (1) establishment of a fabrication method that can combine high surface area for heat transfer and geometric freedom for designing an efficient heat exchanger which has low pressure drop for the coolant and (2) advancement of low cost alloys with appropriate MC properties. In this regard, additive manufacturing may provide the geometric freedom necessary for adapting designs to solid state cooling, and the Ni-Mn(Cu)-Ga Heusler ferromagnetic shape memory alloys (FSMAs), exhibiting a martensitic para-ferromagnetic transformation at T-ms=304 K, can provide a low-cost MC material, very promising for magnetic cooling. In this study, a Ni49.5Mn19.1Cu6.6Ga24.8 (at.%) alloy is additively manufactured using powder bed binder jet 3D printing with subsequent sintering. This printed and sintered material enabled a large change of magnetization during partial transformation cycles with the smallest temperature hysteresis recorded for FSMAs, equal to about 1.2 K, regardless of the value of magnetic field applied. Under 2 T and at 304 K it exhibits an adiabatic temperature change (Delta T-ad) of 2 K and a stable cycling behavior of Delta T-ad = vertical bar 1.7 vertical bar K for 100 cycles. The maximum of magnetic field-induced entropy change vertical bar Delta S-m,S- (2T)vertical bar approximate to 12.0 J/kg.K was estimated at 304 K. These results demonstrate the viability of powder bed binder jet 3D printing as an effective fabrication method for functional magnetocalorics, as well as the outstanding MC characteristics of a low-cost Ni-Mn(Cu)-Ga Heusler-type FSMA.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available