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2 edition of Microstructure, hydrogen_ation and magnetic behaviour of SmCo5. found in the catalog.

Microstructure, hydrogen_ation and magnetic behaviour of SmCo5.

Charles E. King

Microstructure, hydrogen_ation and magnetic behaviour of SmCo5.

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Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Birmingham, Dept of Physical Metallurgy and Science of Materials, 1982.

ID Numbers
Open LibraryOL13802670M

  We report on theoretical investigations of intermetallic phases derived from the ThMn type crystal computational high-throughput screening (HTS) approach is extended to an estimation of the anisotropy constant K 1, the anisotropy field H a and the energy product (BH) calculation of K 1 is fast since it is based on the crystal field parameters Cited by:   Microstructure design for fast oxygen conduction - Volume 31 Issue 1 - Dilpuneet S. Aidhy, William J. Weber Book chapters will be unavailable on Saturday 24th August between 8ampm BST. This is for essential maintenance which will Cited by: This volume entitled Advanced Science and Technology of Sintering, contains the edited Proceedings of the Ninth World Round Table Conference on Sintering (IX WRTCS), held in Belgrade, Yugoslavia, September The gathering was one in a series of World Round Table Conferences on Sintering. Abstract. The textured Pr{sub 2}Fe{sub 14}B nanoflakes were produced by surfactant-assisted ball milling (SABM). Single phase tetragonal structure was characterized for the samples before and after SABM by X-ray diffraction (XRD).


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Microstructure, hydrogen_ation and magnetic behaviour of SmCo5. by Charles E. King Download PDF EPUB FB2

Other explanations of the behaviour of particulate assemblies of SmCo5 have included the nucleation and/or pinning of magnetic domains at metallurgical features such as dislo- cations and stacking faults [7].Cited by: Its microstructure is typical of conventional SmCo 5 magnets, as shown in Fig.

The matrix phase is SmCo 5, the darker Sm 2 Co 7 phase corresponds to 9% of the volume fraction and black dots are pores and oxides.

No cobalt or Sm 2 Co 1 7 were found. Download: Download full-size image; Fig. Microstructure of sample W after by: Microstructure and magnetic properties of SmCo-based nanocrystalline alloys doped with Cr 3 C 2Author: Liya Li, Yicheng Ge, Aru Yan, Jianhong Yi, Yinli Sun, Hui Deng.

The Hydrogen Decrepitation and the Hydrogen Disproportionation Desorption Recombination processes for the preparation and the recycling of the two industrially produced phases of SmCo alloys, SmCo5 and Sm2Co17, are reviewed.

The effects of the chemical composition, the microstructure. The results show that a 5 nm Ti3W7 seed layer improves the microstructure and surface morphology of Cu underlayer, and significantly improves the perpendicular magnetic properties of.

Exchange Coupling and Magnetic Behavior of SmCo 5−x Sn x Alloys Hamid Zaigham †and F. Microstructure Khalid Faculty of Materials Science and Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KPK, Pakistan [Manuscript receivedin revised form November 8, ] Exchange coupling and magnetic properties of SmCo 5 alloys containing different amounts of Sn were in- vestigated in sintered by: The microstructure and magnetic properties of nanocomposite SmCo 5 / Sm 2 Co 17, Sm 2 (CoFe) 17, Sm 2 (CoFeZr) 17, Sm 2 (CoFeCuZr) 17 powders prepared by intensive milling and subsequent annealing have been studied systematically.

A small amount of Fe substitution for Co was found to slightly increase the saturation magnetization and maximum energy product of SmCo 5. Samarium–cobalt magnets can be divided broadly into four categories, depending upon the primary phase, SmCo 5 or Sm 2 Co 17, and the presence of single or two-phase microstructure.

All the Microstructure categories of magnets can be prepared through sintering by: 3. The purpose of the present study is to investigate the microstructure, magnetic properties and magnetization reversal behaviour of nanocomposite SmCo 5 /Sm 2 (Co, M) 17 (M =.

Szmaja et al. and Riley showed that the microstructure of the commercially produced SmCo 5 magnets usually consists of the matrix SmCo 5 phase of a grain size up to 30 µm, randomly distributed mixture of Sm 2 Co 7 and Sm 5 Hydrogen_ation and magnetic behaviour of SmCo5.

book 19 in the size range of 5 µm–50 µm, other Sm-rich phases and Sm-oxides of smaller sizes and by: 4. SmCo 5 particles were synthesized by a spray pyrolysis process with in situ hydrogen (H 2) reduction.

The as-synthesized particles showed homogenous elemental distribution and lowAuthor: Qingda Li, Jianyong Guo, Long Sha. Microstructure and Magnetic Behavior Studies of Processing-controlled and Composition-modified Fe-Ni and Mn-Al Alloys Article (PDF Available) December with 1, Reads How we measure 'reads'Author: Yunlong Geng.

Consistent relationships between metallurgical character- istics of the structural carbon steels and their magnetic properties measured with the electromagnetic sensor were obtained.

In addition, the sensor was found to be able to detect changes in magnetic properties due to variations in cross-section area.

The magnetic properties of SmCo5/alpha - Fe nanocomposite magnets with a core-shell structure were computer-simulated for varying particle size L, alpha - Fe fraction, and temperature. It is shown that HDDR enables us to get alloys containing the SmCo5, Sm2Co17, and Sm2Co7 phases with grain sizes within the range 60– nm and the single-phase magnetic behavior.

The anisotropic powders with microstructural grain sizes within the range 40–75 nm and coercive forces higher than 40 kOe were obtained after milling in hydrogen Cited by: 9.

Books. Publishing Support. Login. effect of individual layer thicknesses allows evaluation of the contribution of the individual layers to the overall magnetic behaviour. To truly model the complex microstructure including the mentioned small angle boundaries goes beyond the approach taken in this by: 4.

In generating a microstructure in a structural material, our aim is to make a material that has good mechanical properties; the job of the mechanical engineer is then to design a safe struc-ture with the material provided by the materials scientist.

The most fundamental mechanical properties are measured in a tensile Size: 2MB. The magnetic and mechanical hardness of the intermetallic compounds SmCo 5 and LaCo 5.

Abstract. The magnetisation, coercivity, H C, and remanence coercivity, H R, have been measured for the intermetallic compounds SmCo 5 and LaCo 5. The coercivities H C and H R for SmCo 5 are very much greater than those for LaCo by: Nanoparticles of Fe and Nd−Fe−B alloy with sizes less than 20 nm have been successfully fabricated by a high-energy ball-milling process in the presence of surfactant and organic carrier liquid.

Structural and magnetic property characterization reveals that these nanoparticles consisting of nanosized grains can be used for fabricating anisotropic nanocomposite by: Abstract: The amorphous formation ability, crystallization behavior and magnetic properties of SmCo 7 magnets melt-spun at 30 and 40 m/s have been studied.

The ribbons melt-spun at 40 m/s exhibit amorphous structure in the range of x for SmCo 7-x (Cr 3 C 2) x alloys. In the amorphous state, these alloys are soft magnetic with intrinsic coercive field i H c of the order.

Fig. The rare-earth elements now used in rare earth-cobalt permanent magnets, their effect on magnet properties (referenced to Sm alloy), and relative cost of the rare earth component. K.J. S T R N A T theoretical models advanced in attempts to explain the multiplicity of observed magnetization reversal phenomena.

Magnetism and Magnetic Materials J. Coey Covering basic physical concepts, experimental methods, and applications, this book is an indispensable text on the fascinating science of magnetism, and an invaluable source of practical reference data.

permanent magnetic properties by careful control of the microstructure. The magnets are produced by powder metallurgy and are solution treated at ~ºC, where they are single phase. This homogenising stage is followed by several aging treatments at lower temperature where a cellular microstructure is formed.

Field- and time-dependent, local and global magnetization behaviour of out-of-plane textured SmCo 5 thin films. M Seifert 1, I Knittel 2, U Hartmann 2, L Schultz 1 and V Neu 1. Published 11 April • IOP Publishing Ltd Journal. Core/shell nanostructures are fascinating for many advanced applications including strong permanent magnets, magnetic recording, and biotechnology.

They are generally achieved via chemical approaches, but these techniques limit them to nanoparticles. Here, we describe a three-dimensional (3D) self-assembly of core/shell-like nanocomposite magnets, with hard-magnetic Cited by: Microstructure and magnetic properties of (SmCo+FeCo)/NdFeB multicomponent nanocomposite magnets fabricated by HPTC with change in heating temperature and composition.

Journal of Rare EarthsDOI: / Z W Geng, M Haseeb, X K Quan, B S Li, W Q Liu, G H Hu, W Q Sun, M Yue, R M by: Microstructure, properties, and failure characteristics of medium-carbon steel subjected to severe plastic deformation Marina V Karavaeva 1, Svetlana K Kiseleva, Marina M Abramova, Artur V Ganeev1 and Ruslan Z Valiev1,2 1Ufa State Aviation Technical University, 12 K.

Marx St., Ufa, Russia 2Saint Petersburg State University, Saint Petersburg, Russia. Temperature, field and angular dependence of coercivity, magnetic interactions and magnetic phenomena are reviewed and their effect on magnetic hysteresis is discussed.

The magnetic properties of novel materials are discussed, including nanoparticles, nanocrystalline granular solids, particulate media, thin films, and bulk magnets.

Morphology and structure of single domain SmCo 5 @Co magnets. SmCo 5 @Co magnets were prepared by a reductive annealing process of Sm[Co(CN)6][email protected] as precursor. X-ray diffraction (XRD) analysis was used to characterize the chemical structure of the product (Figure 2a).The XRD pattern matched well with standard SmCo 5 either in the position or in the Cited by:   This method has been effectively used to prepare nanocrystalline magnets, and high coercivity (33 kOe) was reported in Sm(Co Cu Fe ) 5 melt-spun ribbons.

2 In the present study, we focus on specific metal-substituted melt-spun SmCo 5 magnets, and the effects of metal substitutions on the magnetic properties and microstructure were Cited by: 7.

An ever increasing demand for higher performing magnets drives the need for new and innovative methods to achieve this goal. Sm-Co rare earth permanent magnets have a unique eutectic microstructure that, through refinement, could become a two-phase magnet which would significantly increase their energy product.

The eutectic structure of Sm8Co92 is comprised of Author: Brian Dick. We have performed first-principles calculations to study the interfacial exchange coupling and magnetocrystalline anisotropy energy in a SmCo 5 /Sm 2 Co 17 multilayer model system.

The phase of SmCo 5 and Sm 2 Co 17 stacking along () direction are structurally well matched. The atomic structure, including the alignment and the separation between layers, were firstly Author: Soyoung Jekal.

The influence of Co substitution on the crystallization behavior and magnetic properties of melt-spun (Pr, Tb) 2 (Fe, Nb, Zr) 14 B/a-Fe nanocomposites Journal of Applied Physics, vol. 93, pp. May W. Tang, Y.

Zhang, G. Hadjipanayis Microstructure, magnetic properties and magnetic hardening in Sm-Co magnets. temperature on the structure and magnetic properties of SmCo5/Fe nanocomposite prepared by SPS” Intermetallics, 17, 9. ahsam, i, ," Microwave sintering of nanocrystalline WCCo: Challenges and Perspectives" Int.

J Ref. Met. & Hard Mater. 28, File Size: KB. Magnetic properties hard-soft SmCo5-FeNi and SmCo5-FeCo composites prepared by Electroless Coating Technique M.

Lamichanne, B. Rai, S. Mishra, V.V. Nguyen, and J. Liu Open Journal of Composite Materials,2 However, Cu and Zr are non-magnetic elements, magnetization is reduced. The saturation magnetization Ms of pure Sm2 (Co1Fe)17 is fairly high Ms of Sm2 (CoFe)17 is T. If iHc could have reached at 14kOe, a maximum energy product up to 42MGOe was realized in pure Sm-Co magnet.

Alloying with Fe caused a non-monotonic change in the soft magnetic properties of Co71−XFeXCr7Si8B14 alloys. Hydrogenation caused a progressive deterioration in the soft magnetic properties. The differences in the response of the alloys is possibly due to a non-systematic variation in the inter-atomic exchange interactions which modulates the dipole Author: Seema Kumari, A.

Panda, A. Mitra, J. Datta, I. Chattoraj. History and development of permanent magnets 1. Materials with ferro or firr-magnetic behavior are an important group in our daily life. They played a vital role in the discovery of the New World and in the development of modern technology.

process and the conventional technique has been made by studying the microstructure and the. Purchase Advanced Materials '93 - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. Magnetic properties, microstructure and magnetization reversal in sintered NdFeB6 magnets with the addition of Tb17Fe75B8.

Microstructure and tribological behaviour of alumina composites reinforced with SiC-graphene core-shell nanoparticles. A facile synthesis of anisotropic SmCo5 nanochips with high magnetic by:. Alloying elements such as aluminium, zinc and rare earth metals allow precipitation hardening of magnesium (Mg).

The low densities of such strengthened Mg alloys have led to their adoption as aerospace materials and (more recently) they are being considered as armour materials. Consequently, understanding their response to high strain-rate loading is becoming Cited by: Substrate-effect on the magnetic microstructure of LaSrMnO3 thin films studied by magnetic force microscopy R.

Desfeux, S. Bailleul and A. Da Costa Laboratoire de Physico-Chimie des Interfaces et Applications, Université d’Artois, Rue Jean.Anisotropic magnetic behavior was found in all of the as-milled and annealed flakes.

Both, the thickening of Nd-rich phase at grain boundaries via diffusion of Nd70Cu30 and the surface modification of the Nd2Fe14B flake could be the main reasons for the coercivity enhancement in the as-milled and annealed Nd70Cuadded Nd2Fe14B flakes.