Characterization of magnetic degradation mechanism in a high-neutron-flux environment

Samin, Adib J.; Qiu, Jie; Hattrick‐Simpers, Jason; Dai-Hattrick, Liyang; Zheng, Yuan F.; Cao, Lei

doi:10.1016/j.nimb.2014.05.002

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…The main results of the influence of neutrons on the magnetic characteristics of Nd-Fe-B and Sm-Co alloys are presented in works [36][37][38].…”

Section: Fig 4 Dependence Of the Amount Of Demagnetization On The Num...mentioning

confidence: 99%

Research of Physical Processes in Permanent Magnets Under the Action of Electrons, Neutrons, and Gamma Quantum

Bovda,

Guk

et al. 2024

Problems of Atomic Science and Technology

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A review of works was conducted in which the interaction of electrons, neutrons and gamma quanta from the material of permanent magnets used in electron accelerators was studied. The main conclusions of the review indicate that in order to establish the mechanisms of demagnetization of alloys, it is necessary to carry out detailed studies of changes in the structure of materials after irradiation.

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“…The main results of the influence of neutrons on the magnetic characteristics of Nd-Fe-B and Sm-Co alloys are presented in works [36][37][38].…”

Section: Fig 4 Dependence Of the Amount Of Demagnetization On The Num...mentioning

confidence: 99%

Research of Physical Processes in Permanent Magnets Under the Action of Electrons, Neutrons, and Gamma Quantum

Bovda,

Guk

et al. 2024

Problems of Atomic Science and Technology

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“…The irradiation experiment was performed at the Ohio State University Research Reactor and using the rabbit system which is designed to move samples to the proximity of the reactor core. Additionally, Cadmium was used to filter out the thermal neutrons [30]. Eight magnets were irradiated in that experiment.…”

Section: The Jiles Atherton Model For the Hysteresis Loopsmentioning

confidence: 99%

“…Processes that are thought to contribute to the demagnetization process are transmutations and defects being introduced by the radiation. Transmutation is not thought to play a dominant role in the demagnetization process because it occurs in ppm concentrations [30]. Therefore, we will focus our study on vacancies in the lattice structure.…”

Section: Microstructure Damage Effects On Magnetizationmentioning

confidence: 99%

An analysis of radiation effects on NdFeB permanent magnets

Samin

Kurth

Cao

2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…Effects of various radiations on ferrite material viz. swift heavy ion radiation [1], gamma ray radiation [2], neutron radiation [3], CO 2 laser irradiation [4,5] have been reported in literature. All these irradiation effects are known to produce technologically important modifications in the materials system selected.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microsecond Pulse Laser Modification on Electromagnetic Properties of Grain Oriented Silicon Steel

Puchý

Kováč

Petryshynets

et al. 2017

MSF

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A microsecond pulsed laser beam was used to local magnetic domain modification of electrical grain oriented silicon steel. It was carried out using three different laser pulse regimes: a single pulse laser regime, a multipulse laser regime and a multipulse laser regime with modulation of laser pulses. The laser processing variables were pulse energy and and number of pulses. The samples were tested for nanohardness and coercivity before and after laser treatment. Light optical microscopy, scanning electron microscopy and magnetic force microscopy were used to observe the cross-sectional profile, surface of the samples, and magnetic domain visualization, respectively. The local laser treatment of grain oriented silicon steel surface has been studied in terms of its influence on the magnetic domains and coercivity. It was found that laser-modified samples showed coercivity improvement in comparison to the non-treated samples. The most significant improvement in coercivity was obtained in the modulated multipulse regime and negligible improvement in the single pulse laser regime. Three main effects responsible for the observed improvement were identified, namely: magnetic domain refinement, influence of number of laser pulses and shape of laser HAZ profile. The present work highlights on differences in the magnetic domain structure, microstructure of the laser modified material and basic electromagnetic and mechanical properties. In present study, the pulse laser surface processing was presented as a useful energy efficient alternative to other techniques e.g. mechanical scribing, electrical discharge scribing, plasma jet scribing, etc. The refined magnetic domains in electrosteels are responsible for the observed low coercivity, which indicates perspective application of the investigated laser modified steels in the power transformer cores with lower core losses.

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Characterization of magnetic degradation mechanism in a high-neutron-flux environment

Cited by 7 publications

References 17 publications

Research of Physical Processes in Permanent Magnets Under the Action of Electrons, Neutrons, and Gamma Quantum

Research of Physical Processes in Permanent Magnets Under the Action of Electrons, Neutrons, and Gamma Quantum

An analysis of radiation effects on NdFeB permanent magnets

Effect of Microsecond Pulse Laser Modification on Electromagnetic Properties of Grain Oriented Silicon Steel

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