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magnetic field stability

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003154
EISBN: 978-1-62708-199-3
..., such as hysteresis alloys used in motors. It primarily focuses on the stability of magnetic fields that influences reversible and irreversible losses in magnetization with time, and the choice of magnet material, component shape and magnetic circuit arrangement. Selected References Selected References...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001109
EISBN: 978-1-62708-162-7
... to maintain the superconducting state to much larger values of the applied magnetic field before the free-energy balance favors the normal state. Stability of the superconducting state in magnetic fields up to the upper critical magnetic field ( H c2 ) allows type II materials to be exploited for high...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001110
EISBN: 978-1-62708-162-7
... at a given magnetic field. The process of heat treatment and cold working needed to develop these microstructures will be discussed in greater detail below. Adequate stability has been identified as being of first-order importance in the operation of electromagnetic systems incorporating...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001094
EISBN: 978-1-62708-162-7
... , 1987 • Zingery W.L. et al. , Evaluation of Long-Term Magnet Stability , J. Appl. Phys. , Vol 1 , March 1966 For understanding a permanent magnet, Faraday's concept of representing a magnetic flux field by lines of force is very useful. The lines of force radiate outward...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003155
EISBN: 978-1-62708-199-3
... diffusion barriers composed of concentric rings of niobium around vanadium. The matrix surrounding the filaments is copper. 75× Fig. 1 Critical temperature, current density, and magnetic field boundary separating superconducting and normal conducting states. These data, which are for a niobium...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001111
EISBN: 978-1-62708-162-7
...) superconducting magnet was wound using a 7 μm (280 μin.) layer of Nb 3 Sn deposited on a stainless steel substrate with a 7 μm (280 μin.) layer of copper to act as the stabilizer ( Ref 25 ). The large aspect ratio (300:1) leads to magnetic instability at low fields. The chloride process is based on a hydrogen...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003062
EISBN: 978-1-62708-200-6
...Abstract Abstract Ceramic materials serve important insulative, capacitive, conductive, resistive, sensor, electrooptic, and magnetic functions in a wide variety of electrical and electronic circuitry. This article focuses on various applications of advanced ceramics in both electric power...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003153
EISBN: 978-1-62708-199-3
... operating inductions (a) ASTM A 677 only Fig. 5 Magnetic saturation of nickel-iron alloys at various field strengths. All specimens were annealed at 1000 °C (1830 °F) and cooled in the furnace. Fig. 6 Initial permeability at 2 mT (20 G) for annealed Ni-Fe alloys Fig. 7...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001337
EISBN: 978-1-62708-173-3
...-beam welders. Because the magnetic field effect on the beam (the magnetomotive force) is directly proportional to the current in the windings of the device, these power supplies are typically current regulated. (Eq 12) m m f = N ⋅ I where N is the number of turns in the coil and I...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006057
EISBN: 978-1-62708-175-7
...—Dielectromagnetics and Magnetodielectrics , Rev. Powder Metall. Phys. Ceram. , Freund Publishing Limited , 1990 • Weglinski B. , Sinters for Magnetic Applications , Rev. Powder Metall. Phys. Ceram. , Vol 5 ( No. 1 ), 1992 In simple terms, magnetism is a field force produced either...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005876
EISBN: 978-1-62708-167-2
... on the solution of Maxwell's equations (MEs) and provides some basic information regarding the heat transfer and fluid equations, because these physical phenomena usually are strongly coupled to magnetic and electric fields. The solutions are usually obtained by using specific numerical methods such as finite...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001089
EISBN: 978-1-62708-162-7
.... , and Daane A.H. , Physical Metallurgy , in Handbook on the Physics and Chemistry of Rare Earths , Vol 11 , Gschneidner K.A. Jr. , and Eyring L. , Ed., North-Holland , 1988 , p 409 – 484 6. Sinha S.K. , Magnetic Structures and Inelastic Neutron Scattering: Metals, Alloys...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001093
EISBN: 978-1-62708-162-7
... are characterized by retaining a large amount of residual magnetism after exposure to a strong magnetic field. These materials typically have coercive force, H c , values of several hundred to several thousand oersteds (Oe) and are considered to be permanent magnets. The coercive force is a measure...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006664
EISBN: 978-1-62708-213-6
... purity and stability and to identify components in a mixture. Gas chromatography/mass spectrometry is commonly used in scientific fields, including environmental chemistry for atmospheric, soil, and water research; forensic science for detection of drugs of abuse (or metabolites) and in arson fire debris...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006663
EISBN: 978-1-62708-213-6
... into charged species, which can be manipulated using magnetic or electric fields for mass analysis. In research environments, ionization techniques use plasmas, lasers, and surfaces under vacuum or atmospheric pressure. Methods to create negative ions are mature, but are needed only in special applications...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006018
EISBN: 978-1-62708-175-7
... seed by dampening both with water and sprinkling with iron powder. The iron sticks to the weed seeds, which are characteristically more fibrous and wettable, followed by magnetic separation ( Ref 7 ). Fluid seals are created using iron powder suspended in oil, surrounded by magnetic fields...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001114
EISBN: 978-1-62708-162-7
... room-temperature (RT) approaches. The incorporation of superconducting wire or tape into large magnets and power generators, for example, provides the ability to transport large dc currents with no measurable resistive losses. High magnetic fields can thus be produced at a significantly reduced cost...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003732
EISBN: 978-1-62708-177-1
... decomposition spinodal transformation structure SPINODAL TRANSFORMATION is a phase-separation reaction that occurs from kinetic behavior first described by Gibbs in his treatment of the thermodynamic stability of undercooled or supersaturated phases. It is does not involve a nucleation step, which...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001750
EISBN: 978-1-62708-178-8
.... If placed in a microwave-resonant cavity between the pole pieces of a strong electromagnet, such a sample absorbs microwave energy at particular values of the magnetic field that are characteristic of the positions and the crystalline environments of the unpaired electrons. Plotting the microwave absorption...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002363
EISBN: 978-1-62708-193-1
... motion of magnetic domain walls when they break away from pinning sites because of changes in the magnetic field H. By placing a search coil in the vicinity of the specimen undergoing a change in magnetization, a series of transient pulses of electromotive force will be induced across it and could...