Thermal properties of NbTi superconductor wire and its heat release performance over quench

Li, Yanzhong

doi:10.1016/s0921-5093(00)01002-9

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Niobium has a body centered cubic (BCC) structure and unique properties such as being non-magnetic, chemical compatibility, and high ductility at cryogenic temperatures. Materials such as Nb 3 Sn and NbTi that contain Nb as the main element exhibit superconductive properties below 20 K. MgB 2 /Nb/Cu wire, (with T c of 39 K) in which Nb is used in bulk, exhibits the highest critical temperature among materials incorporating Nb [1][2][3]. In order to use MgB 2 /Nb/Cu wire for a superconducting magnet for magnetic resonance imaging (MRI) machines, an appropriate technique for fabrication of long-length wire is required.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and texture evolution of pure niobium in cold-drawn Mg+B/Nb/Cu wires

Park

Lee

Jeong

2022

Mater. Res. Express

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In this study, Mg+B wires were prepared by powder in tube method using Nb and Cu tubes as barrier and sheath, respectively, followed by cold drawing. Microstructural, textural, and mechanical properties of the Nb barrier at different drawing strains (εd) were investigated. The results showed that the Nb barrier demonstrated a saturation hardness of 159.4 HV. The microstructure of the Nb barrier became elongated along the drawing direction increasing εd. Sub-grains existing inside the deformed grains rotated from low-angle grain boundaries to high-angle grain boundaries and developed into new grains. The main textural components of the Nb barrier were {111}<110> γ-fiber and {hkl}<110> α-fiber. Recrystallized grains exhibited a low maximum orientation distribution function intensity, weak {100}<110> α-fibers, and strong {111}<110> γ-fibers as compared to those of the deformed grains. The relationship between the microstructure evolution and mechanical properties of the Nb barrier and the changes in the cross-sectional area fractions of the materials constituting the Mg+B composite wire are discussed. The current study provides details about the misorientation profile inside deformed grains and continuous dynamic recrystallization mechanism of the cold-drawn Nb barrier.

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Section: Introductionmentioning

confidence: 99%

Microstructure and texture evolution of pure niobium in cold-drawn Mg+B/Nb/Cu wires

Park

Lee

Jeong

2022

Mater. Res. Express

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“…Below certain temperatures, materials incorporating Nb such as NbTi (10 K), Nb 3 Sn (18 K), Nb 3 Al (18 K), and MgB 2 /Nb/Cu (39 K) exhibit superconductive properties, making them viable for use in the magnet system of a magnetic resonance imaging (MRI) machine in the form of tubes [1][2][3]. For the production of tubes from MgB 2 /Nb/Cu superconductive materials, Nb tubes are initially assembled with MgB 2 powder in the form of a rod of diameter > 10 mm [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect of strains on textural evolution of hydrostatically extruded niobium tubes

Lee

Park

Jeong

2020

Materials Science and Technology

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The influence of tube strains on tube deformation ratios and textural evolution during the deformation of pure Nb tubes subjected to hydrostatic extrusion was investigated. The tube deformation ratios increased with increasing tube strains. A very strong <111> fibre texture at a lower strain transformed to a dual strong <100> and weak <111> fibre texture at a higher strain. The texture evolution led to an increase in the Taylor factor at the drawing tensor.

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Heat transfer – a review of 2000 literature

Goldstein

Eckert

Ibele

et al. 2002

International Journal of Heat and Mass Transfer

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Thermal properties of NbTi superconductor wire and its heat release performance over quench

Cited by 7 publications

References 6 publications

Microstructure and texture evolution of pure niobium in cold-drawn Mg+B/Nb/Cu wires

Microstructure and texture evolution of pure niobium in cold-drawn Mg+B/Nb/Cu wires

Effect of strains on textural evolution of hydrostatically extruded niobium tubes

Heat transfer – a review of 2000 literature

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