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2 edition of magnetic hardness of the uniaxial intermetallic compounds SmCo5 and LaCo5. found in the catalog.

magnetic hardness of the uniaxial intermetallic compounds SmCo5 and LaCo5.

G P. Carswell

magnetic hardness of the uniaxial intermetallic compounds SmCo5 and LaCo5.

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Published in Bradford .
Written in English


Edition Notes

Ph.D. thesis. Typescript.

SeriesTheses
The Physical Object
Pagination96p.
Number of Pages96
ID Numbers
Open LibraryOL13652995M

MAGNETIC SUSCEPTIBILITY OF THE ELEMENTS AND INORGANIC COMPOUNDS When a material is placed in a magnetic field H, a magnetiza-tion (magnetic moment per unit volume) M is induced in the ma-terial which is related to H by M = κ H, where κ is called the volume susceptibility. Since H and M have the same dimensions, κ is di-mensionless. Samarium Cobalt magnets exhibit good corrosion resistance when compared to Neodymium magnets.. For most applications, a coating or plating is not required, but it should be considered when operating in environments that are acidic, have high moisture, or are in a vacuum. 2 1 10 10 1 10 3 10 5 10 7 La Ca MnO 3 Na 2 O*11Al 2 O 3 YBa 2 Cu 3 O 7 Superconductors >10 23 Cu Pb Graphite Ge Si Glass Insulators Semiconductors Metals ConductivityFile Size: 2MB.   A twophase alloy of a Ni 3 Al intermetallic compound and a Ni-Al solid solution was obtained after sintering at °C. The creep resistance of the in-situ sintered Ni-5 wt.% Al alloy was better than that of the conventional Ni-Al alloy green sheet, even though the sintering temperature of the Ni-5 wt.% Al alloy was ° by: 2.

Magnetic Properties of The Base Metal - The nature of the ferrous base metals affects magnetic measurements, and separate calibrations should be made for metals which vary much in magnetic properties (as measured by their magnetic attraction). The attractive forces between a small magnet and many different specimens of mild steel such as are.


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magnetic hardness of the uniaxial intermetallic compounds SmCo5 and LaCo5. by G P. Carswell Download PDF EPUB FB2

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: The Curie temperatures and also possible magnetic phase transitions were investigated by measuring the temperature dependence of the ac susceptibility in the temperature range from to K.

The hysteresis loops of the as-cast and annealed SmCo 5− x Cu x compounds were measured from to the Curie temperature by using a pulsed-field magnetometer with a Cited by: We have successfully synthesized novel SmCo 7− xM x (M= 3d transition metal or normal metal) intermetallic compounds.

The structural and magnetic properties of SmCo 7− xM x compounds have been investigated using powder X-ray diffraction and magnetic by: Conclusions. A new electroerosion process has been developed for the production of SmCo 5 alloy powder characterized by a high level of magnetic properties, in particular coercive force, and good stability of these properties during aging at room and elevated by: 2.

Magnetic structure of intermetallic compounds of rare earth and 3d transition metal with the C15 structure is studied on the basis of the classical Heisenberg model. By making use of the Lyons-Kaplan method, magnetic phase diagram is calculated. In uniaxial R-Co alloys, the anisotropy energy is much larger ( x erg/ CM3 in YC05 ), and indeed, a polarized neutron study on YCos [2] has shown that the orbital contribution reaches about 15% of the total magnetic by: The local magnetic moments of Y, Co(2c) and Co(3g) of the intermetallic compound YCo 5 were calculated.

The obtained results are presented in Table 1, where other theoretical and experimental results are also listed for by: 2. The observation of magnetic domain structures of the intermetallic compounds SmCo 5, LaCo 5 and CeCo 5Cited by: 9. The rare earth intermetallic phases with high uniaxial magnetocrystalline anisotropy, such as SmCo 5, Sm 2 Co 17, and Nd 2 Fe 14 B are the basis for high-performance rare earth magnets.

Samarium–cobalt magnets exhibit the highest coercive fields J H c and (Nd,Dy)–(Fe,Co)–B:(Al,Cu,Ga) magnets show the highest value of remanence B r and. The influence of mechanical milling on magnetic properties of various types of intermetallic compounds has been extensively investigated. It is established that, on the one hand the measurement of magnetic properties is a very sensitive probe to monitor the structural changes of intermetallic compounds during milling, and on the other hand milling may induce in the.

Magnetic and neutron-diffraction methods have been used to study the magnetic state of polycrystalline and amorphous samples of the intermetallic compound Ce2Fe The amorphous state was obtained by irradiating the intermetallic compound by fast neutrons. It has been shown that the competition of ferromagnetic and antiferromagnetic interactions between Cited by: 1.

The magnetic structure and magnetization distribution of the intermetallic compound U14Au51 This item was submitted to Loughborough University's Institutional Repository by the/an author.

Additional Information: • A Doctoral Thesis. Submitted in partial ful lment of the requirements for the award of Doctor of Philosophy of Loughborough.

The uniaxial intermetallic compounds of LFePt and the low temperature NiAs structure of MnBi are suitable alloys for application as high-density recording materials or as high-coercivity.

The hardness results show that, within experimental error, the SmCo5 is very nearly isotropic, whereas the LaCo5 is very anisotropic on the {10¯10} planes with a Knoop hardness of.

Of all the Sm-Co intermetallic compounds, SmCo 5 and Sm 2 Co 17 are the two important hard magnetic phases [1] and they crystallize in hexagonal Author: Oliver Gutfleisch.

MAGNETIC AND MAGNETOELASTIC PROPERTIES C easy direction is typical for ferromagnetics (Fig. The Curie temperature Tc determined from a2 = f(H/u) dependence is equal to K that is close to data [I]. The obtained value of magnetic moment per U-atom pB is essentially more than.

The crystal and magnetic structures of hexagonal compounds LaCo5, LaCo4Ga, and YCo4Ga (space group P6/mmm) have been investigated by time-of-flight neutron diffraction at K. The Ga atoms are. Anisotropic magnetic SmCo5 nanoflakes have been fabricated by surfactant-assisted ball milling (SABM) using hardened steel balls of one of the following sizes: 4.

Magnetic and Mossbauer spectroscopic study of some rare earth-iron intermetallic compounds Mahcli S Lataifeh Depanmelll of Physics. Mu'tnh Uni versity. Mu'tah. AI-Karak, Jordan Received 30 July revised 10 April accepted 29 Arril   Quenching in a magnetic field has a beneficial effect: It increases the coercive force of a magnet from a SmCo5 alloy powder.

Thermomagnetic treatment results in “freezing” of magnetic and phase- and-structure changes in : Ya. Bogatin, V. Zemchenkov, E. Povolotskii. Material Hardness Review Hardness is the property of a material that enables it to resist plastic deformation, penetration, indentation, and scratching.

Therefore, hardness is important from an engineering standpoint because resistance to wear by either friction or erosion by steam, oil, and water generally increases with hardness. 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.

the RCo 5 group of intermetallic compounds was next, leading up to the broader family of rare earth magnets. The magnetic hardness is caused by a. Increasing strength and conductivity of Cu alloy through abnormal plastic deformation of an intermetallic compound.

Sci. Rep. 6, ; doi: /srep ().Cited by: morphology, grain size, and anisotropy field of these samples have a great influence on the magnetic properties. Keywords: SmCo7-type alloy, magnetic properties, grain size, anisotropy field 1. Introduction Rare earth cobalt-based intermetallic compounds have potential applications as permanent magnets owing to their distinctive electronic.

Saturation magnetization and neutron diffraction measurements have been performed on cubic Laves phase compounds RCo 2 in which R is Nd, Tb, Ho, and Er. Neutron powder patterns obtained at room temperature and at 15°K allowed the determination of the magnetic structures.

The low‐temperature patterns are of the ferromagnetic or ferrimagnetic type, with large magnetic Cited by: Magnetic and superconducting materials pervade every avenue of the technological world - from microelectronics and mass-data storage to medicine and heavy engineering.

Both areas have experienced a recent revitalisation of interest due to the discovery of new materials, and the re-evaluation of a wide range of basic mechanisms and phenomena.

MAGNETIC SUSCEPTIBILITY OF THE ELEMENTS AND INORGANIC COMPOUNDS When a material is placed in a magnetic field H, a magnetization (magnetic moment per unit volume) M is induced in the material which is related to H by M = κH, where κ is called the volume H and M have the same dimensions, κ is dimensionless.

A more useful File Size: 61KB. Singh et al.: Elastic, Acoustical and Electronic Behaviour of the RM (R = Dy, Ho, Er; M=Cu, Zn) Compounds electronic and acoustical properties of these materials for future applications.

The present study is an attempt in this direction. First principle calculations have been carried out. %I.A,C.S., and a low hardness, approximately RB.

The aluminum alloy, in. the annealed temper, is a multiphase mixture. Approximately 88% by volume of the alloy is comprised of the aluminum matrix which is a dilute solid solution.

The remaining alloy volume is composed of particles of intermetallic compounds which are dispersedCited by: 1. Preface This book is designed to serve the needs of the engineering and technical communities for high-quality and comprehensive information regarding specific electrical and magnetic properties of metals.

carbonitriding may improve the hardness range from HV. During carbonitriding precipitation of Fe4N is decomposed to austenite phase in a discontinuous manner. Fe4N compound is precipitated in grain boundary [1]. AISI and steel are surface treated under carburizing and carbonitriding.

Increase in hardnessFile Size: KB. tural rare-earth compounds—compare NdCo and SmCo in Fig. 2—are well known to reflect the shape of the rare-earth electron clouds (see e.g., [2], [8]). The shape of the shells is given by the Stevens factor in the case of uniaxial crystals (hexagonal.

Magnetic susceptibility measurements of transition metal containing compounds Introduction: Measurements of magnetic properties have been used to characterize a wide range of systems from oxygen, metallic alloys, solid state materials, and coordination complexes containing metals.

Most organic and main group element compounds have all the electrons. The electronic and magnetic properties including heavy-fermionic and Kondo behavior of various intermetallic compounds have been studied by magnetic and NMR measurements. Microstructural evolution of ball-milled alloys of Al-Ti-Si and Al-Cu-Nb which are of importance in automobile and aviation industries, have been studied by NMR using.

Electronic and Magnetic Structures, Magnetic Hyperfine Fields and Electric Field Gradients in UX 3 (X = In, Tl, Pb) Intermetallic Compounds SAJID KHAN, MAJID YAZDANI-KACHOEI, SAEID JALALI-ASADABADI, MUHAMMAD BILAL FAROOQ, and IFTIKHAR AHMAD, Journal of ELECTRONIC MATERI ().

This test method provides a quantitative measure of the susceptibility to intergranular corrosion of Al-Mg and Al-Mg-Mn alloys.

The nitric acid dissolves a second phase, an aluminum-magnesium intermetallic compound (βAl-Mg), in preference to the solid solution of magnesium in the aluminum matrix.

Telcon Metals - Alloys of High Magnetic Permeability Hardcover – by Unknown (Author) See all formats and editions Hide other formats and editions. Price New from Used from Hardcover, "Please retry" — — Author: Unknown.

The deformation behavior of the Γ (gamma) phase in the Fe-Zn system has been investigated via room-temperature compression tests of single-crystal micropillar specimens fabricated by the focused ion beam method. Trace analysis of slip lines indicates that {} slip occurs for the specimens investigated in the present study.

Although the slip direction has not been uniquely Cited by: 2. Abstract. In this paper, the phase compositions, microstructures, atomic structures, and magnetic properties of Co-rich SmCo 10 alloys prepared by arc-melting, annealing, and melt-spinning were studied. It was found that as-cast alloy is composed of Th 2 Zn type Sm 2 Co 17 matrix with an average grain size of ∼45 m accompanied by lamellar eutecticum (consisting of α-Co and Th 2 Cited by: 1.

Hardness– Gemological Properties:“Magnetic Hematite” or “Hematine” is a composite material derived from Natural Hematite (iron oxide-Fe2O3), Magnetite (iron oxide- Fe3O4) and small amounts of other natural minerals such as copper, titanium and aluminum. This composite material can be intensely and permanently magnetized.

ATI 9™ plate is a nonmagnetic, high tensile strength steel, which displays high toughness and outstanding wear resistance for an austenitic steel.The Embrittlement and Fracture of Steels: Part One Abstract: Most groups of alloys can exhibit failure by cracking in circumstances where the apparent applied stress is well below that at which failure would normally be expected.

Steels are no exception to this, and probably exhibit a wider variety of failure mechanisms than any other.Development Of New Hardness Conversion Tables For ASTM E Project Overview • The objective is to develop new hardness conversion tables for ASTM E • Scales: HRC, HR15N, HV, HBW, and LEEB • PH nickel alloys (i.e., Alloys, Plus & )File Size: KB.