GROWTH OF CERAMICS, METALS AND METAL-CERAMIC INTERFACES FROM MOLECULAR BEAMS

1990 ◽

Vol 48 (4) ◽

pp. 346-347

Author(s):

J. Mayer ◽

C. P. Flynn ◽

M. Rühle

Keyword(s):

Three Dimensional ◽

Molecular Beams ◽

Special Technique ◽

X Ray Diffraction ◽

Orientation Relationships ◽

Ion Milling ◽

Mbe Growth ◽

Metal Ceramic ◽

Ceramic Interfaces ◽

Atomistic Structure

HREM Studies of the atomistic structure of idealized metal/ceramic interfaces are important for both fundamental and applied reasons. Epitaxial growth by molecular beams allows to produce such interfaces under controlled conditions. Nb/Al2O3 has been chosen as a model system because of the absence of any chemical reactions between the metallic overlayer and the ceramic substrate and since both components possess nearly the same thermal expansion coefficient. Results of x-ray diffraction studies indicate that a unique three-dimensional orientation relationship exists between niobium and sapphire which is established for different choices of surface plane of the sapphire substrate. Aim of the present investigations was to study the orientation relationships and the atomic arrangement at the interface by conventional TEM and HREM.During MBE growth the sapphire substrates were heated to 1123 K and a vacuum in the 10-7Pa range was maintained. Typical growth rates of 1 monolayer/sec were obtained. Cross-section TEM samples were prepared by a special technique involving cylindrical alumina holders with a diameter of 3mm. Shielding was applied during ion-milling to reduce the effect of the different milling rate of Nb and Al2O3.

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Amorphous Films at Metal/Ceramic Interfaces

Zeitschrift für Metallkunde ◽

10.3139/146.030272 ◽

2003 ◽

Vol 94 (3) ◽

pp. 272-276 ◽

Cited By ~ 21

Author(s):

Amir Avishai ◽

Christina Scheu ◽

Wayne D. Kaplan

Keyword(s):

Amorphous Films ◽

Metal Ceramic ◽

Ceramic Interfaces

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Metal hetero-diffusion along the metal-ceramic interfaces: A case study of Au diffusion along the Ni-sapphire interface

Acta Materialia ◽

10.1016/j.actamat.2019.12.051 ◽

2020 ◽

Vol 186 ◽

pp. 242-249 ◽

Cited By ~ 4

Author(s):

Hagit Barda ◽

Eugen Rabkin

Keyword(s):

Metal Ceramic ◽

Ceramic Interfaces

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Interface Electronic And Magnetic Structures Of Layered Fe In Contact With MgO

MRS Proceedings ◽

10.1557/proc-238-799 ◽

1991 ◽

Vol 238 ◽

Author(s):

Young Keun Kim ◽

Michael E. McHenry ◽

Manuel P. Oliveria ◽

Mark E. Eberhart

Keyword(s):

First Principles ◽

State Of The Art ◽

Magnetic Moments ◽

Magnetic Structures ◽

Consistent Field ◽

Structure Of Metal ◽

Metal Ceramic ◽

Layer Technique ◽

Self Consistent Field ◽

Ceramic Interfaces

ABSTRACTA model based on the state-of-the-art, first-principles layer Korringa-Kohn-Rostoker (LKKR) method has proven to be very effective in describing the electronic and magnetic structure of metal/ceramic interfaces. We have performed self-consistent field computations incorporating spin polarization both for Fe/MgO superlattice (bulk technique) and for MgO/Fe/MgO sandwich (layer technique) systems. Muffin-tin potentials were employed for both materials in our computations. Iron layer was embedded in MgO, the host material, to have a [110](100)Fe / [100](100)MgO contact configuration. A large enhancement of magnetic moments has been found at the interface.

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