Characterization of NiMnGa magnetic shape memory alloys
2004年11月30日 · In this paper, we discuss the results of the characterization tests of various NiMnGa alloy crystals, with and without post-crystal growth heat treatment, by DSC, dilatometry, and optical metallography and scanning electron microscopy.
Novel high entropy alloys of FexCo1-xNiMnGa with excellent soft ...
2018年9月1日 · The Fe x Co 1-x NiMnGa (FeNiMnGa, Fe 0.5 Co 0.5 NiMnGa, and CoNiMnGa) alloys are designed based on the high entropy effect and the model of the Ni 2 MnGa alloy in searching for the potential functional magnetic alloys with improved mechanical properties.
Physical Characterization of Sintered NiMnGa Ferromagnetic …
2020年10月28日 · The present work focused on the microstructural, thermal, electrical, and damping characterization of NiMnGa samples produced through a powder pressing and a sintering process; the effect of sintering times and of the starting powder size were evaluated.
Elaboration of magnetostrain-active NiMnGa particles/polymer …
2021年4月15日 · NiMnGa is a prototypical ferromagnetic shape memory alloy exhibiting a giant magnetic field induced strain (MFIS). Recently, we have elaborated bulk NiMnGa-particles/silicone composites exhibiting a 4% of MFIS.
NiMnGa/Si Shape Memory Bimorph Nanoactuation - Springer
2016年10月18日 · The NiMnGa/Si bimorph nanoactuators are fabricated by a combination of ultra-high resolution electron beam lithography (EBL) and reactive-ion etching (RIE) steps. The transfer of the primary resist pattern created by EBL into the FSMA layer is a main challenge in fabrication as RIE of Ni is well-known to produce non-volatile reaction products.
Abslruct-Strain versus field measurements for a ferromagnetic shape memory alloy in the NiMnGa system demonstrate the largest magnetostrictive strains to date of nearly 1.3%. These strains are achieved in the martensitic state through field-induced variant rearrangement.
Magnetic Domains and Twin Boundary Movement of NiMnGa …
2012年5月29日 · Time-resolved metallographic optical microscopy techniques are used together with magnetic domain imaging to clarify the interaction between magnetic domains and twin boundary (TB) motion in magnetic shape memory NiMnGa single crystals.
Physical Characterization of Sintered NiMnGa Ferromagnetic …
2020年10月28日 · The present work focused on the microstructural, thermal, electrical, and damping characterization of NiMnGa samples produced through a powder pressing and a sintering process; the effect of sintering times and of the starting powder size were evaluated.
Ferromagnetic shape memory in the NiMnGa system
2002年8月6日 · Abstract: Strain versus field measurements for a ferromagnetic shape memory alloy in the NiMnGa system demonstrate the largest magnetostrictive strains to date of nearly 1.3%. These strains are achieved in the martensitic …
NiMnGa polycrystalline magnetically activated shape memory …
We report on the structural characteristics, magnetic properties and magnetically induced deformations obtained on as produced and annealed samples of bulk polycrystalline NiMnGa alloys. Extensive structural, magnetic and magnetomechanical characteristic are presented.