A5043073898- Shape Memory Alloy Transformations
- Metallurgical and Alloy Processes
- Intermetallics and Advanced Alloy Properties
- Muon and positron interactions and applications
- Magnetic Properties and Applications
- Electronic Packaging and Soldering Technologies
- Magnetic and transport properties of perovskites and related materials
- Particle accelerators and beam dynamics
- Microstructure and Mechanical Properties of Steels
- Heusler alloys: electronic and magnetic properties
- Magnetic Properties of Alloys
- Rare-earth and actinide compounds
- High Temperature Alloys and Creep
- Atomic and Molecular Physics
- Semiconductor materials and interfaces
- Optical Network Technologies
- Superconducting Materials and Applications
- Aluminum Alloy Microstructure Properties
- Magnetic properties of thin films
- nanoparticles nucleation surface interactions
- MXene and MAX Phase Materials
- Metallurgical Processes and Thermodynamics
- Creativity in Education and Neuroscience
- Advanced Photonic Communication Systems
- Thermodynamic and Structural Properties of Metals and Alloys
RIKEN Nishina Center
2014-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2024
Science and Technology Facilities Council
2024
RIKEN Advanced Science Institute
2001-2023
Kyoto University
2018-2022
RIKEN
2003-2021
Nippon Soken (Japan)
2014-2021
Tohoku University
2009-2020
Graduate School USA
2018
Pioneer (Japan)
2018
Martensitic and magnetic transformations of the Heusler Ni50Mn50−yXy (X=In, Sn Sb) alloys were investigated by differential scanning calorimetry measurement vibrating sample magnetometry technique. In all these alloy systems, austenite phase with ferromagnetic state was transformed into martensite phase, which means that have potential as Ga-free shape memory (FSMAs). Furthermore, multiple martensitic transformations, such two- or three-step occur in systems. It confirmed transmission...
We have identified cobalt-base superalloys showing a high-temperature strength greater than those of conventional nickel-base superalloys. The alloys are strengthened by ternary compound with the L1(2) structure, gamma' Co3(Al,W), which precipitates in disordered gamma face-centered cubic cobalt matrix high coherency and melting points. also compound, Ir3(Al,W), suggests that Co-Ir-Al-W-base systems gamma+gamma' (Co,Ir)3(Al,W) structures offer great promise as candidates for next-generation...
Shape-memory alloys, such as Ni-Ti and Cu-Zn-Al, show a large reversible strain of more than several percent due to superelasticity. In particular, the Ni-Ti-based alloy, which exhibits some ductility excellent superelastic strain, is only material available for practical applications at present. We herein describe ferrous polycrystalline, high-strength, shape-memory alloy exhibiting 13%, with tensile strength above 1 gigapascal, almost twice maximum obtained in alloys. Furthermore, this has...
A superelastic alloy formed from common elements operates over a wide temperature window.
Shape memory and magnetic properties of a Ni43Co7Mn39Sn11 Heusler polycrystalline alloy were investigated by differential scanning calorimetry, the sample extraction method, three-terminal capacitance method. A unique martensitic transformation from ferromagnetic parent phase to antiferromagneticlike martensite was detected magnetic-field-induced “reverse” transition confirmed in high field. In addition, large shape recovery strain about 1.0% observed accompany reverse transformation,...
This paper introduces a new approach to measure the muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and electric dipole (EDM) |$d_{\mu}$| at J-PARC facility. The goal of our experiment is |$a_{\mu}$| using an independent method with factor 10 lower momentum, 20 smaller diameter storage-ring solenoid compared previous ongoing |$g-2$| experiments unprecedented quality storage field. Additional significant differences from present experimental include 1000 transverse emittance beam...
A system of ferromagnetic β phase Ni–Co–Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed. The this within composition range Ni (30–45 at. %) Co–(27–32 Al, undergo a paramagnetic/ferromagnetic transition as well thermoelastic martensitic transformation from to β′(L10) phase. Curie and start temperatures in can be controlled independently fall 120–420 K. specimens some undergoing β′ are accompanied by effect. These hold great promise new smart materials.
Ferromagnetic shape memory alloys with a body-centered-cubic ordered structure in Ni–Ga–Fe system have been developed. The the composition range of Ni 27 at. % Ga (20–22 %)Fe exhibit thermoelastic martensitic transformation from B2 and/or an L21 parent to martensite phase, seven-layer modulated (14M) and five-layer (10M) structure, ferromagnetic state. phase transforms at about 970 K during cooling, degree order is increased by annealing 773 K, resulting increase both starting Curie...
Magnetic and martensitic transition behaviors of a Ni46Mn41In13 Heusler alloy were investigated by differential scanning calorimetry vibrating sample magnetometry. A unique from the ferromagnetic austenite phase to antiferromagneticlike martensite was detected magnetic-field-induced “reverse” confirmed in high magnetic field. In addition, large positive entropy change, which reached 13J∕kgK at 9T, observed accompany reverse transition. This shows promise as metamagnetic shape memory with...
Magnetization and high resolution neutron powder diffraction measurements on the magnetic shape memory compound Ni2Mn1.44Sn0.56 have confirmed that it is ferromagnetic below 319 K undergoes a structural phase transition which takes place at TM = 221 cooling 239 warming. The temperature has cubic L 21 structure, 5.973 Å, with excess manganese atoms occupying 4(b) tin sites. In 245 moments both sites were found to be ferromagnetically aligned. moment 4(a) was 1.88(10) μB but only 0.53(18)...
Magnetic properties and magnetic-field-induced strains (MFIS) have been investigated for off-stoichiometric Ni–Mn–Al Heusler alloys with an ordered L21 structure. A clear martensitic transformation in Ni53Mn25Al22 alloy was revealed below the Curie temperature. In polycrystalline specimen, irreversible relative change due to MFIS confirmed between martensite start finish temperatures Ms Mf, a maximum length ΔL/L|7T of about −100 ppm observed at just above Mf. On other hand, large 1000 has...