scholarly journals High Performance Calculation of Magnetic Properties and Simulation of Nonequilibrium Phenomena in Nanofilms

2014 ◽  
pp. 95-107
Author(s):  
Vitalii Yu. Kapitan ◽  
Konstantin V. Nefedev
Keyword(s):  
Magnetic Properties ◽  
High Performance ◽  
Nonequilibrium Phenomena ◽  
Performance Calculation

Effect of (Sm,Pr)2Co7 phase on magnetic properties of high-performance (Sm,Pr)Co5 magnet based on EBSD analysis and magnetic domain observation

2021 ◽  
Vol 181 ◽  
pp. 111478
Author(s):  
Jianjun Yang ◽  
Dongtao Zhang ◽  
Rongchun Zhu ◽  
Xiaochang Xu ◽  
Dan Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Performance ◽  
Magnetic Domain ◽  
Ebsd Analysis

Tetranuclear cobalt(ii)–isonicotinic acid frameworks: selective CO2capture, magnetic properties, and derived “Co3O4” exhibiting high performance in lithium ion batteries

2019 ◽  
Vol 48 (1) ◽  
pp. 296-303 ◽  
Author(s):  
Lei Zhou ◽  
Honghong Fan ◽  
Baolei Zhou ◽  
Zheng Cui ◽  
Bowen Qin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Isonicotinic Acid ◽  
Lithium Ion ◽  
Excellent Performance ◽  
Porous Framework

A CoIIporous framework exhibits high CO2selectivity, and the prepared Co3O4-anode from the framework shows excellent performance in lithium ion batteries.

Nanocrystalline and Nanostructured High-Performance Permanent Magnets

2001 ◽  
Vol 674 ◽  
Author(s):  
D. Goll ◽  
W. Sigle ◽  
G.C. Hadjipanayis ◽  
H. Kronmüller
Keyword(s):  
Magnetic Properties ◽  
High Performance ◽  
Permanent Magnets ◽  
Maximum Energy ◽  
High Quality ◽  
Hardening Mechanism ◽  
Temperature Dependences ◽  
Complex Correlation ◽  
Energy Products

ABSTRACTThe rather complex correlation between the microstructure and the magnetic properties is demonstrated for two types of high-quality RE-TM permanent magnets (pms), namely nanocrystalline RE2Fe14B (RE = Nd,Pr) and nanostructured Sm2(Co,Cu,Fe,Zr)17 pms. The detailed analysis of this correlation for both pm materials leads to a quantitative comprehension of the hardening mechanism enabling the optimization of their magnetic properties and temperature dependences. In the case of RE2Fe14B, isotropic bonded pms are fabricated showing maximum energy products in the order of 90 kJ/m3. In the case of Sm2(Co,Cu,Fe,Zr)17, magnets with excellent high-temperature magnetic properties are tailored. Hereby, the investigations in addition provide important clues to the evolution of the characteristic microstructural and magnetic properties and to the role of the involved elements.

scholarly journals Microstructure and Magnetic Properties of Ce14Fe78Co2B6 Nanopowders Prepared by Ball Milling at Low Temperature

2021 ◽  
Vol 7 (12) ◽  
pp. 160
Author(s):  
Marian Grigoras ◽  
Mihaela Lostun ◽  
Firuta Borza ◽  
Marieta Porcescu ◽  
George Stoian ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Ball Milling ◽  
Liquid Nitrogen ◽  
High Performance ◽  
Permanent Magnets ◽  
X Ray Diffraction ◽  
Hard Magnetic Properties ◽  
Uniform Particle Size ◽  
Microstructure And Magnetic Properties

Ce14Fe78Co2B6 nanopowders with hard-magnetic properties have been successfully prepared by ball milling at low temperatures in liquid nitrogen. The morphology, structure, and magnetic properties of Ce14Fe78Co2B6 powders have been investigated using scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometry, respectively. It was found that powder ball milling at low temperature in liquid nitrogen, has the advantage that the oxidation of powders is inhibited and the particles rapidly reach nanometric dimensions. In comparison to the Ce14Fe78Co2B6 powders prepared by ball milling at room temperature, the powders milled at low temperature present a more uniform particle size and no rare-earth oxides, which leads thus to remarkable magnetic properties. The nanocrystalline Ce14Fe78Co2B6 powders with optimum characteristics, prepared at low temperature, have the size of 153 nm or less, present a coercivity of 5.1 kOe, and a saturation magnetization of 113 emu/g after milling for 6 h at low temperature. Low temperature milling may become a promising technique for the fabrication of high performance powders used for permanent magnets preparation.

scholarly journals Development of a High-Performance-Ferrite Magnet Fabrication Process without Sintering Additives

2021 ◽  
Vol 59 (8) ◽  
pp. 551-559
Author(s):  
Pyeong-Yeol Yu ◽  
Min-Ho Kim ◽  
Young-Min Kang
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
High Performance ◽  
Secondary Phase ◽  
Batch Process ◽  
Maximum Energy ◽  
Magnetic Flux Density ◽  
Sintering Additives ◽  
Energy Product ◽  
Hard Magnetic Properties

Sintered M-type hexaferrites with the chemical formula of Sr0.3Ca0.4La0.3Fe9.8Co0.2-xMnxSi0.135O19-d (x = 0, 0.05, 0.1, 0.2) and Sr0.3Ca0.4La0.3Fe9.8-yCo0.2MnySi0.135O19-d (y = 0.05, 0.1, 0.2) were prepared by conventional solid station reaction routes. A high sintering density of more than 95% of the theoretical density was achieved in all hexaferrite samples when calcination was carried out at 1100 oC for 4 h, followed by sintering at 1230-1250 oC for 2 h without the use of sintering additives. High saturation magnetization and coercivity were achieved simultaneously at the x = 0.05 composition, where Mn replaces part of the Co. The secondary phase Fe2O3 generated by the initial addition of SiO2 was gradually reduced when the Fe contented was decreased in the Sr0.3Ca0.4La0.3Fe9.8-zCo0.15Mn0.05Si0.135O19-d samples, and a single M-type hexaferrite phase was confirmed in the Sr0.3Ca0.4La0.3Fe8.3Co0.15Mn0.05Si0.135O19-d (z = 1.5) sample, which also exhibited optimized hard magnetic properties, with a saturation magnetization of 4581 G and coercivity of 4771 Oe. Anisotropic sintered magnets were fabricated using the optimized composition, and showed excellent hard magnetic properties, with a remanent magnetic flux density of 4400 G and intrinsic coercivity of 4118 Oe, and a maximum energy product of 4.72 M·G·Oe. This result is very promising because high magnet performance can be achieved with a single batch process without the need for sintering additives during the process.

High-performance, cost-effective permanent nanomagnet: Microstructural and magnetic properties of Fe-substituted SmCo nanofiber

2019 ◽  
Vol 471 ◽  
pp. 273-276 ◽  
Author(s):  
Jimin Lee ◽  
Tae-Yeon Hwang ◽  
Min Kyu Kang ◽  
Gyutae Lee ◽  
Hong-Baek Cho ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Performance ◽  
Cost Effective

Fracture Toughness and Magnetic Properties of Sm2Co17-Based Magnets

2013 ◽  
Vol 645 ◽  
pp. 81-84 ◽  
Author(s):  
Ai Kun Li ◽  
Li Ya Li ◽  
Yuan Dong Peng ◽  
Jian Hong Yi
Keyword(s):  
Fracture Toughness ◽  
Magnetic Properties ◽  
High Performance ◽  
Maximum Energy ◽  
Crack Deflection ◽  
Toughening Mechanisms ◽  
Screw Dislocations ◽  
Yield Plateau ◽  
High Toughness ◽  
Type Magnet

We present our findings of increased fracture toughness in high performance Sm2Co17-type magnet. The new Sm(Co 0.65 Fe 0.24 Cu 0.08 Zr 0.03)7.6magnet exhibits remanence of 11.13 kGs, maximum energy of 30.2 MGOe. This magnet shows not only a superhigh fracture toughness of 5.56 MPa m 1/2 but also distinguished yielding combined with an enhanced plastic plateau of 30 % to failure. It has been found that debonding, crack deflection, crac k branching and bridging are the major toughening mechanisms for the observed high toughness and long yield plateau. Long and straight screw dislocations observed in Sm rich precipitates accelerate the debonding of Sm rich grains.

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