Anisotropic thermal and mechanical properties of bulk high- Tc Bi-based superconductors

Anna Tampieri; G. Celotti; A. Bellosi; S. Guicciardi; E. Landi

doi:10.1007/BF02462186

Anisotropic thermal and mechanical properties of bulk high- T_c Bi-based superconductors

Anna Tampieri, G. Celotti, A. Bellosi, S. Guicciardi, E. Landi

Research output: Contribution to journal › Article

Abstract

Superconducting powders with nominal composition Bi_1.84Pb_0.34Sr_1.91Ca_2.03Cu_3.06O_x were prepared by two different routes: by solid-state reaction of the respective oxides and carbonates and by pyrolysis of organic precursors. Highly dense superconducting specimens characterized by textured microstructure were prepared by hot pressing. The thermal-expansion coefficients of different typologies of samples were measured by dilatometric tests in both directions parallel and perpendicular to the pressure application direction. Structural rearrangements occurring during thermal treatments were studied. As regards mechanical characterization, microhardness, flexural strength and fracture toughness were evaluated and related to the microstructure anisotropic degree of the sample.

Original language	English (US)
Pages (from-to)	1863-1869
Number of pages	7
Journal	Il Nuovo Cimento D
Volume	16
Issue number	10
DOIs	https://doi.org/10.1007/BF02462186
State	Published - Jan 1 1994

Keywords

01.30.Cc
74.30.Ek
Conference proceedings
thermal conductivity
Thermodynamic properties

ASJC Scopus subject areas

Physics and Astronomy(all)
Ocean Engineering
Mechanical Engineering
Electrical and Electronic Engineering
Control and Systems Engineering
Engineering (miscellaneous)
Nuclear Energy and Engineering
Computer Science Applications
Chemical Engineering(all)

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abstract = "Superconducting powders with nominal composition Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06Ox were prepared by two different routes: by solid-state reaction of the respective oxides and carbonates and by pyrolysis of organic precursors. Highly dense superconducting specimens characterized by textured microstructure were prepared by hot pressing. The thermal-expansion coefficients of different typologies of samples were measured by dilatometric tests in both directions parallel and perpendicular to the pressure application direction. Structural rearrangements occurring during thermal treatments were studied. As regards mechanical characterization, microhardness, flexural strength and fracture toughness were evaluated and related to the microstructure anisotropic degree of the sample.",

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AU - Tampieri, Anna

AU - Celotti, G.

AU - Bellosi, A.

AU - Guicciardi, S.

AU - Landi, E.

PY - 1994/1/1

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