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Estructura y textura de la fase Al3CaZn en una chapa laminada de la aleaciónsuperplástica Al-5 % Ca-5 % Zn

REA Auditado

En este trabajo se ha determinado la estructura de la fase Al3CaZn, presente en una chapa laminada de
la aleación Al-5 % Ca-5 % Zn, mediante técnicas de difracción de rayos X (DRX) y difracción de
electrones (MET). Además, se ha estudiado su textura mediante figuras de polos y la función de distribución
de orientaciones (FDO). La aleación Al-5 % Ca-5 % Zn objeto de este estudio consta de una
matriz de aluminio de grano fino (d ~ 2-3 jxm) y un 20 % vol. de la fase Al3CaZn.

Tema: general: 

• Ciencias

Late Miocene alluvial sediments from the Teruel area: Magnetostratigraphy, magnetic susceptibility, and facies organization

REA Auditado

[EN] We present the paleomagnetic dating of the upper Miocene red alluvial to palustrine sequences of the area north of Teruel. The magnetostratigraphy
of the Masada del Valle and Masada Ruea sections indicates a minimum age of about 11 Ma to the lowermost sediments
post-dating the unconformity over the Mesozoic basement. The overall Miocene sequence represents a retrogradation of the alluvial
system, grading upwards into palustrinellacustrine sedimentation. The onset of palustrine deposition is dated in Masada Ruea at
about 9.7 Ma.

Tema: general: 

• Ciencias

Annealing of electrophoretic YBa2Cu3O7 coatings on polycristaline substrates by zonal laser fusion

REA Auditado

[EN] Obtaining coatings on metallic substrates of irregular geometries is not easy by traditional methods. In those cases
electrochemical methods show important advantages and have been used successfully. To date only silver has shown to be
inert with respect to superconducting cuprates, although progress has been made in the development of intermediate buffer
layers. However, in the particular case of YBa2Cu3O7 , annealing above the cuprate superconducting melting point to attempt
densification or texturing is hard on silver because of the lower melting point of the metal. .

Tema: general: 

• Ciencias