Cold-powder metallurgy-processed chevrel-phase superconducting wires. II. Reacted “in situ” PbMo6S8 powder

Chevrel, R.; Hirrien, Maryvonne; Sergent, M.; Couach, M.; Dubots, P.; Genevey, Pierre

doi:10.1016/0167-577x(89)90044-x

Cited by 4 publications

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“…s c r i p t in Europe: Universities of Rennes, Geneva and Nijmegen with Plansee, Spectrospin and Promogap (European Union ProgrammeEureka 96). Briefly, the CP (prereacted[53] or its precursors[54]) is compacted in a copper tube ("billet") that is extruded, and then drawn as a long monofilament wire. In further improvements, sections of such wires were assembled in bundles and again extruded and drawn to produce multifilament wires as shown inFigure 10[50,54].…”

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confidence: 99%

“…Briefly, the CP (prereacted[53] or its precursors[54]) is compacted in a copper tube ("billet") that is extruded, and then drawn as a long monofilament wire. In further improvements, sections of such wires were assembled in bundles and again extruded and drawn to produce multifilament wires as shown inFigure 10[50,54]. In order to avoid any contamination of PbMo 6 S 8 by Cu, an anti-diffusion barrier (mainly Nb and in some cases Mo) was inserted[50,[53][54].…”

mentioning

confidence: 99%

“…In further improvements, sections of such wires were assembled in bundles and again extruded and drawn to produce multifilament wires as shown inFigure 10[50,54]. In order to avoid any contamination of PbMo 6 S 8 by Cu, an anti-diffusion barrier (mainly Nb and in some cases Mo) was inserted[50,[53][54]. Whatever the route used, the critical current density was in the range 1-2 10 8 A/m 2 at 200 kG and 4.2 K[55].…”

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Chevrel Phases: Genesis and Developments

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Perrin

Chevrel

2019

Structure and Bonding

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This chapter summarizes the important role played by Marcel Sergent in the discovery in the Rennes Laboratory of the Chevrel-Phases, which stimulated considerable interest in the international solid state chemistry community, because of their remarkable superconducting properties. After a brief general introduction to this topic the seminal discoveries associated with these phases between 1970 and 1990 are described. After their initial synthesis and structural determination was discovered, it was necessary to establish their critical superconducting transition temperature, the critical magnetic field and the critical current density in wires, single crystals, and thin films. More recently their applications as battery materials, in catalysis and their thermo-electric properties have been studied and are briefly described. These phases opened up the way not only to a rich solid state chemistry, but also to a rich solution chemistry, which complemented the classical field of transition metal carbonyl clusters. The basic cluster units of the Chevrel-Phases continue to be studied in the Rennes laboratory by the heirs of Marcel Sergent and more widely in the international community.

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