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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
...Abstract Abstract Superconductivity has been found in a wide range of materials, including pure metals, alloys, compounds, oxides, and organic materials. Providing information on the basic principles, this article discusses the theoretical background, types of superconductors, and critical...
Abstract
Superconductivity has been found in a wide range of materials, including pure metals, alloys, compounds, oxides, and organic materials. Providing information on the basic principles, this article discusses the theoretical background, types of superconductors, and critical parameters of superconductivity. It discusses the magnetic properties of selected superconductors and types of stabilization, including cryogenic stability, adiabatic stability, and dynamic stability. The article also focuses on alternating current losses in superconductors, including hysteresis loss, penetration loss, eddy current loss, and radio frequency loss. Furthermore, the article describes the flux pinning phenomenon and Josephson effects.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003155
EISBN: 978-1-62708-199-3
...Abstract Abstract Superconductors are materials that exhibit a complete disappearance of electrical resistivity on lowering the temperature below the critical temperature. A superconducting material must exhibit perfect diamagnetism, that is, the complete exclusion of an applied magnetic field...
Abstract
Superconductors are materials that exhibit a complete disappearance of electrical resistivity on lowering the temperature below the critical temperature. A superconducting material must exhibit perfect diamagnetism, that is, the complete exclusion of an applied magnetic field from the bulk of the superconductor. Superconducting materials that have received the most attention are niobium-titanium superconductors (the most widely used superconductor), A15 compounds (in which class the important ordered intermetallic Nb3Sn lies), ternary molybdenum chalcogenides (Chevrel phases), and high-temperature ceramic superconductors. This article provides an overview of basic principles of superconductors and the different classes of superconducting materials and their general characteristics.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001108
EISBN: 978-1-62708-162-7
...Abstract Abstract This article reviews the history of superconductivity from its discovery in the early 1900s to the renewed interest in the mid-1980s spurred by the development of high-temperature superconducting devices. It identifies some of the materials in which superconductivity has been...
Abstract
This article reviews the history of superconductivity from its discovery in the early 1900s to the renewed interest in the mid-1980s spurred by the development of high-temperature superconducting devices. It identifies some of the materials in which superconductivity has been observed, including metals and alloys, compounds, and oxides, and discusses their properties as well as potential applications. The article also explains how various superconducting materials are produced and provides a foundation for understanding the basic operating principles.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001112
EISBN: 978-1-62708-162-7
..., or 200 kG). This article discusses the fabrication methods of PbMo6S8 (PMS) and SnMo6S8 (SMS), including hot processing and cold processing. It provides a short note on the superconducting properties of PMS wire filaments and their applications in processes requiring high magnetic fields, such as high...
Abstract
Ternary molybdenum chalcogenides stands for a vast class of materials, whose general formula is MxMO6X8, where, M is a cation and X is a chalcogen (sulfur, selenium, or tellurium). Possible applications of some of these are as high field superconductors (that is, >20 T, or 200 kG). This article discusses the fabrication methods of PbMo6S8 (PMS) and SnMo6S8 (SMS), including hot processing and cold processing. It provides a short note on the superconducting properties of PMS wire filaments and their applications in processes requiring high magnetic fields, such as high-energy physics, thermonuclear fusion, and nuclear magnetic resonance.
Image
Published: 01 January 2005
Fig. 20 Modified jelly-roll process for producing superconducting multifilamentary wire
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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
...Abstract Abstract The discovery of the high-critical-temperature oxide superconductors has accelerated the interest for superconducting applications due to its higher-temperature operation at liquid nitrogen or above and thus reduces the refrigeration and liquid helium requirement. It also...
Abstract
The discovery of the high-critical-temperature oxide superconductors has accelerated the interest for superconducting applications due to its higher-temperature operation at liquid nitrogen or above and thus reduces the refrigeration and liquid helium requirement. It also permits usage of the high-critical-temperature oxides in magnets or power applications in high-current-carrying wire or tape with acceptable mechanical capability. This article discusses the powder techniques mainly based on the production of an oxide powder precursor, which is then subjected to various processing, including powder-in-tube processing, vapor deposition processing, and melt processing. It further discusses the microstructural, anisotropy and weak link influences on these processes.
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
..., and greater compatibility with copper stabilizing materials. This article discusses the ramifications of design requirements, selection criteria and processing methods of superconducting fibers and matrix materials. It provides information on the various steps involved in the fabrication of superconducting...
Abstract
Niobium-titanium alloys (NbTi) became the superconductors of choice in the early 1960s, providing a viable alternative to the A-15 compounds and less ductile alloys of niobium-zirconium. This can be attributed to the relative ease of fabrication, better electrical properties, and greater compatibility with copper stabilizing materials. This article discusses the ramifications of design requirements, selection criteria and processing methods of superconducting fibers and matrix materials. It provides information on the various steps involved in the fabrication of superconducting composites, including assembly, welding, isostatic compaction, extrusion, wire drawing, twisting, and final sizing. The article also provides a detailed account of the properties and applications of NbTi superconducting composites.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001113
EISBN: 978-1-62708-162-7
...Abstract Abstract This article focuses on different thin-film deposition techniques used to make superconducting films and discusses the properties and advantages of high-critical-temperature and low-critical-temperature materials in a number of applications, including signal processing...
Abstract
This article focuses on different thin-film deposition techniques used to make superconducting films and discusses the properties and advantages of high-critical-temperature and low-critical-temperature materials in a number of applications, including signal processing and analog electronic devices. The article gives a brief introduction on superconducting materials, substrates and buffer layers and discusses the major deposition techniques such as, electron-beam co-evaporation, sputtering from either a composite target or multiple sources and laser ablation. The article also describes the in-situ film growth techniques for producing atomic oxygen by radio frequency excitation or microwave discharge or with ozone.
Image
Published: 01 January 2005
Fig. 16 Cross section of 3000 filaments of Nb 3 Sn in final conductor. Courtesy of Oxford Superconducting Technology
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Image
Published: 01 January 2005
Fig. 15 Cross section of niobium filaments reacted with tin in the bronze substrate to form Nb 3 Sn. Courtesy of Oxford Superconducting Technology
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Image
Published: 01 January 2005
Fig. 14 Cross section of 500 niobium-titanium filaments separated by a copper substrate and enclosed within a copper-nickel tube. Courtesy of Oxford Superconducting Technology
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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
... A atoms centered in every face yielding orthogonal chain structures running through the crystal ( Fig. 1 ). Of 76 known A15 compounds, 46 are known to be superconducting ( Fig. 2 and Table 1 ). The A atoms are from the groups IVA, VA, and VIA transition metals, whereas the B atoms are from groups IIIB...
Abstract
This article reviews the phase diagrams, alloy with third element additions, layer growth, critical current density, and matrix materials of A15 superconductors. It describes the production methods of tape conductors (chloride deposition, and surface diffusion) and multifilamentary wires (rod process, modified jelly roll process, niobium tube process, in-situ process, powder metallurgy process, and jelly roll method). The article focuses on reaction heat treatment, which is required at the end of wire processing to convert the ductile components to the desired, but brittle, superconductor. Finally, it discusses the applications of A15 superconductors in commercial magnets, power generation, power transmission, high-energy physics, and fusion.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003062
EISBN: 978-1-62708-200-6
... and electronics industry, namely, dielectric, piezoelectric, ferroelectric, sensing, magnetic and superconducting devices. advanced ceramics applications dielectric devices electric power industry electronics industry ferroelectric devices magnetic devices piezoelectric devices sensing devices...
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 and electronics industry, namely, dielectric, piezoelectric, ferroelectric, sensing, magnetic and superconducting devices.
Book Chapter
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004008
EISBN: 978-1-62708-185-6
.... It presents an overview of the processes, equipment, dies and die materials, and lubrication associated with drawing of rod, wire, bar, and tube. The article also provides a discussion on the design considerations and manufacturing of commercial superconducting multifilamentary conductors. bar drawing...
Abstract
The drawing process, one of the oldest metal forming operations, allows excellent surface finishes and closely controlled dimensions to be obtained in long products that have constant cross sections. This article discusses the basic mechanics and preparation steps of drawing. It presents an overview of the processes, equipment, dies and die materials, and lubrication associated with drawing of rod, wire, bar, and tube. The article also provides a discussion on the design considerations and manufacturing of commercial superconducting multifilamentary conductors.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001095
EISBN: 978-1-62708-162-7
... that the amorphous films became superconducting at temperatures higher than those of the corresponding equilibrium phases. In addition, they were able to show that the amorphous films crystallized at relatively low temperatures. In the case of pure metals (for example, tin, lead, bismuth, and so on), crystallization...
Abstract
Metallic glasses can be prepared by solidification of liquid alloys at cooling rates sufficient to suppress the nucleation and growth of competing crystalline phases. This article presents a historical survey of the study of metallic glasses and other amorphous metals and alloys. This includes a discussion of synthesis and processing methods, structure and morphology, and a description of the electronic, magnetic, thermodynamic, chemical, and mechanical properties of metallic glasses. In addition, the article describes the development of metallic glasses as materials for technical applications.
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001294
EISBN: 978-1-62708-170-2
... for possible application in the fabrication of thin-film superconductors at the time that bulk superconductors were being developed. Even though PLD was far from the advanced level of other film growth techniques, it was demonstrated that high-quality superconducting films could be reproducibly deposited...
Abstract
This article presents a general description of pulsed-laser deposition. It describes the components of pulsed-laser deposition equipment. The article also discusses the effects of angular distribution of materials. Finally, the article reviews the characteristics of high-temperature superconductors and ferroelectric materials.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001461
EISBN: 978-1-62708-173-3
... service (where temperatures can be as low as 4 K) provides opportunities to exploit special material properties associated with such low temperatures (superconductivity, for example). However, these opportunities must be weighed against some potential high penalties, such as the loss of structural...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001464
EISBN: 978-1-62708-173-3
... includes a trend band for yield strength versus toughness ( Ref 6 ). This alloy has a good balance of strength and toughness, and has found application as the structural case for large superconducting magnets. As its strength increases (through additions of nitrogen), its toughness decreases...
Abstract
Cryogenic temperatures cause many structural alloys to become brittle, which is an unacceptable condition in most structural applications and is rectified by optimizing the weld composition. Although nonmatching weld compositions are most appropriate, differences between the welds and parent material in terms of thermal contraction, corrosion, and other factors must be considered. This article discusses these differences and describes the effect of these factors on the choice of the weld filler metal. It also provides a detailed discussion on the effects of cryogenic services on mechanical properties of the parent metal.
Book Chapter
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001117
EISBN: 978-1-62708-162-7
... 26.2 99.8 62 26.55 (a) IACS, International Annealed Copper Standard. (b) At 20 °C (70 °F) Electrolytic Solution Potential −0.84 V versus 0.1 N calomel electrode in NaCl-H 2 O 2 solution Temperature of Superconductivity 1.2 K Magnetic Properties Magnetic...
Abstract
This article presents the following characteristics of pure metals : structure, chemical composition, mass characteristics, thermal properties, electrical properties, chemical properties, magnetic properties, optical properties, fabrication characteristics, nuclear properties, and mechanical properties.
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006505
EISBN: 978-1-62708-207-5
... of the superconductivity temperature. Hamel ( Ref 24 ) determined the effect of strain rate and orientation on the tensile properties and work hardening for samples of 99.99 and 99.3% aluminum sheet. Hammad and others ( Ref 25 ) investigated work softening yield points in 99.995% Al in the temperature range of 100 to 450...
Abstract
The purity of aluminum is generally characterized in one of two ways, by terminology or by the Aluminum Association designation system. This article reviews the properties of pure aluminum in purities from 99.99 percent through commercial purity, 99.00 percent. The mechanical properties of aluminum are discussed in terms of tensile properties, stress-strain relationships, and creep. The article also reviews the physical properties of aluminum, such as atomic structure and nuclear properties, atomic spectrum, crystal structure, density, thermal expansion, and thermal conductivity. It discusses the chemical properties of aluminum and presents a summary tabulation of the mechanical strength, ductility, and hardness of pure aluminum.