Microstructure, transport properties and chemical reactions in ceramics and composities: application to superconductor based composites.

• Autorzy: Gavarii J.R. , Kopia-Zastawa A. , Fremy M.A. , Pischedda M.H. , Suliga I. , Jasieńska S.
• Konferencja: XV Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies AMT'98, Kraków-Krynica, Poland, 17-21 May, 1998
• Języki publikacji: EN

Abstrakty

EN

In this review, we deal with active two-phase composites made of one superconducting constituent (S) and of an additional phase (F) having a mechanical or electrical role. To interpret the effects of sintering processes, two types of modelling approaches are discussed: firstly, the modelling of the chemical diffusions and, secondly, the chemical reactivity which conditions both electrical and mechanical properties of the resulting F/S composites. The chemical reactions at the interfaces of the F/S composites are firstly described by a simplified Fick law approach: each element can be characterized by one apparent chemical diffusion coefficient D. Then expressing the chemical reaction following the classical form: F + n.S -> P, and considering elemental kinetics laws (d[F]/dt = -k1. [F][S]), we propose to determine two new parameters characteristic of the degradation of the system during the sintering process. Finally, three types of parameters (D, n, k1) are available to describe the chemical evolutions in composites.

Słowa kluczowe

EN

microstructure; composite; ceramics; superconductor; diffusion; kinetics; sintering

PL

mikrostruktura; kompozyt; ceramika; nadprzewodnik; dyfuzja; kinetyka; spiekanie

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 813--818
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Gavarii J.R.

• Laboratoire Matériaux Multiphasés et Interfaces. Faculté des Sciences et Techniques, Université de Toulon-Var, France

autor

Kopia-Zastawa A.

• Laboratoire Matériaux Multiphasés et Interfaces. Faculté des Sciences et Techniques, Université de Toulon-Var, France

autor

Fremy M.A.

• Laboratoire Matériaux Multiphasés et Interfaces. Faculté des Sciences et Techniques, Université de Toulon-Var, France

autor

Pischedda M.H.

• Laboratoire Matériaux Multiphasés et Interfaces. Faculté des Sciences et Techniques, Université de Toulon-Var, France

autor

Suliga I.

• Laboratory Metallurgy and Materials Science, Institute of Metallurgy, Academy of Mining and Metallurgy, Cracow, Poland

autor

Jasieńska S.

• Laboratory Metallurgy and Materials Science, Institute of Metallurgy, Academy of Mining and Metallurgy, Cracow, Poland

• Universite de Toulon-Var, Faculte des Sciences et Techniques

Bibliografia

• [1] B. Ropers, F. Carmona, S. Flandrois, Physica C, 204, 71 (1992)
• [2] B. Ropers, F. Carmona, S. Flandrois, Appl. Supercond. 1 (7-8), 1015 (1993)
• [3] S. Dubois, S. Flandrois, F. Carmona, Phys.A, 207, 265 (1994)
• [4] A. Benlhachemi, S. Golec, J.R. Gavarri, Physica C 209, 353-361 (1993)
• [5] Benlhachemi, J. Musso, J.R. Gavarri, C. Alfred-Duplan, J. Marfaing, Phys. C 230, (1994), 246-254
• [6] Benlhachemi, J.R. Gavarri, J. Musso, C. Alfred-Duplan, J. Marfaing, Metall. Foundry Engineering, 20, 2, 205-216, (1994).
• [7] Benlhachemi, J.R. Gavarri, Y. Massiani, S. Aïtyazza, Physica C, 235-240, 1511, (1994)
• [8] Quammou, O. Pena, A. Benlhachemi, J.R. Gavarri, C. Carel, Ann. Chim. Fr., 19, 493-498 (1994)
• [9] Benlhachemi, J.R. Gavarri, Y. Massiani, J. Marfaing, Annal. Chim, Sc. Matériaux, 20, 335-344 (1995).
• [10] Siwek, I. Suliga, M.H. Pischedda, J.R. Gavarri, St. Jasienska, Sol. Stat. Ion., 80, 45-52 (1995)
• [11] Alfred-Duplan, J. Marfaing, G. Vacquier, A. Benlhachemi, J. Musso, J.R. Gavarri, Mat. Science Engin. B29, 1, 1996.
• [12] J.R. Gavarri (2), L. Tortet and J. Musso, Solid State Ionics, to be published in 1998.