Lattice instability of compound Nb3Sn in strained state

Savitskii, E.M.; Bychkova, M. I.; Baron, V.V.; Dzevitskii, B. E.; Savateev, N. I.

doi:10.1002/pssa.2210370258

Cited by 9 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Obviously, large strain can evoke serious and irreversible damage to the superconductor in the form of cracks in the brittle A15 material [92]. Lower strain can vary the superconducting properties through strain-induced lattice instabilities that result in a tetragonal distortion [93,94] and by influencing the electron-electron interactions, which can both be reversible. The latter can, in the case of A15 Nb-Sn, be discussed in terms of lattice distortions that influence the Nb chain integrity and thus N (E F ), or in terms of changes in lattice vibration modes which influence the electron-phonon interaction spectrum (which includes changes in N (E F )).…”

Section: Microscopic Origins Of Strain Dependencementioning

confidence: 99%

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state

Godeke¹

2006

Supercond. Sci. Technol.

234

213

View full text Add to dashboard Cite

Significant efforts can be found throughout the literature to optimize the current carrying capacity of Nb3Sn superconducting wires. The achievable transport current density in wires depends on the A15 composition, morphology and strain state. The A15 sections in wires contain, due to compositional inhomogeneities resulting from solid state diffusion A15 formation reactions, a distribution of superconducting properties. The A15 grain size can be different from wire to wire and is also not necessarily homogeneous across the A15 regions. Strain is always present in composite wires, and the strain state changes as a result of thermal contraction differences and Lorentz forces in magnet systems. To optimize the transport properties it is thus required to identify how composition, grain size and strain state influence the superconducting properties. This is not accurately possible in inhomogeneous and spatially complex systems such as wires. This article therefore gives an overview of the available literature on simplified, well defined (quasi-)homogeneous laboratory samples. After more than 50 years of research on superconductivity in Nb3Sn, a significant amount of results are available, but these are scattered over a multitude of publications. Two reviews exist on the basic properties of A15 materials in general, but no specific review for Nb3Sn is available. This article is intended to provide such an overview. It starts with a basic description of the Niobium-Tin intermetallic. After this it maps the influence of Sn content on the the electron-phonon interaction strength and on the field-temperature phase boundary. The literature on the influence of Cu, Ti and Ta additions will then be briefly summarized. This is followed by a review on the effects of grain size and strain. The article is concluded with a summary of the main results.

show abstract

Section: Microscopic Origins Of Strain Dependencementioning

confidence: 99%

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state

Godeke¹

2006

Supercond. Sci. Technol.

234

213

View full text Add to dashboard Cite

show abstract

“…It is evident that to apply a stress on a material, its macrostructure will be changed in the form of strain, deformation, or cracks, etc. [21,22]. For A15 superconductors, indirect indicators for such changes are superconducting critical parameters such as J c , H c2 , and T c .…”

Section: Macroscopic Structure and Propertiesmentioning

confidence: 99%

A multi-scale point of view on the structure–property relationships of A15 superconductors

et al. 2014

View full text Add to dashboard Cite

Nb 3 Sn and other A15 members have been widely applied in nuclear power, nuclear magnetic resonance, and high-energy particle accelerators for their high critical current density (J c) and upper critical field (B c2). There have been comprehensive and intensive studies on the applications, the fundamental lattice dynamic and electronic properties, etc., of A15 superconductors. Various reviews on the preparations, structures, and properties have already been written in the last few years. Nevertheless, on account of the large amount of existing facts and views, a coherent view on the relations between the structures and properties has not appeared to unify the facts. This article sketches a multi-scale point of view on the relations between the multiscale structures and the corresponding properties.

show abstract

“…the filamentary critical current density J c varies through a change in μ 0 c2 (T) that has a direct influence on the maximum bulk pinning force [60]. Strain can cause a lattice instability leading to a tetragonal distortion [59], [61], influencing the electron-electron interactions and thereby the electron density of states (DOS) at the Fermi level N(E F ) and, through the condensation energy, the interaction between flux-lines and pinning centers. Experiments show that reversible changes are related closely to the deviatoric strain, while the impact of volumetric strain is negligible [62].…”

Section: A Lattice Strain and Microscopic Originmentioning

confidence: 99%

Intra wire resistance and strain affecting the transport properties of Nb3Sn strands in cable-in-conduit conductors

Zhou

View full text Add to dashboard Cite

Lattice instability of compound Nb3Sn in strained state

Cited by 9 publications

References 0 publications

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state

A multi-scale point of view on the structure–property relationships of A15 superconductors

Intra wire resistance and strain affecting the transport properties of Nb3Sn strands in cable-in-conduit conductors

Contact Info

Product

Resources

About

Lattice instability of compound Nb3Sn in strained state

Cited by 9 publications

References 0 publications

A review of the properties of Nb3Sn and their variation with A15 composition, morphology and strain state

A review of the properties of Nb3Sn and their variation with A15 composition, morphology and strain state

A multi-scale point of view on the structure–property relationships of A15 superconductors

Intra wire resistance and strain affecting the transport properties of Nb3Sn strands in cable-in-conduit conductors

Contact Info

Product

Resources

About

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state

A review of the properties of Nb₃Sn and their variation with A15 composition, morphology and strain state