Atomic-scale structure and chemistry of ceramic/metal interfaces - I. Atomic structure of {222} MgO/Cu (Ag) interfaces

D. A. Shashkov; M. F. Chisholm; D. N. Seidman

doi:10.1016/S1359-6454(99)00255-4

Atomic-scale structure and chemistry of ceramic/metal interfaces - I. Atomic structure of {222} MgO/Cu (Ag) interfaces

D. A. Shashkov^*, M. F. Chisholm, D. N. Seidman

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

36 Scopus citations

Abstract

Ceramic/metal (C/M) {222} MgO/Cu (Ag) heterophase interfaces, prepared by internal oxidation, are studied by scanning transmission electron microscopy (STEM). The observed spacing between misfit dislocations (1.45 nm) in a 〈110〉 projection is in agreement with the prediction of Bollmann's geometric O-lattice theory and experimental values in the literature for {222} MgO/Cu interfaces. It is concluded that the {222} MgO/Cu (Ag) interfaces are semicoherent and contain a trigonal network of pure edge misfit dislocations parallel to 〈110〉-type directions, with an (a/6)〈211〉-type Burgers vector. Misfit dislocations are also found in a standoff position at a distance of a single (111) spacing of the Cu (Ag) matrix. Extra intensity at the interface, in some angular dark-field images indicates silver segregation, in agreement with our atom-probe field-ion microscope results. On the metal side of the interface, extra intensity is observed in five atomic layers, which corresponds to a total silver enrichment of approximately 0.7 effective monolayers.

Original language	English (US)
Pages (from-to)	3939-3951
Number of pages	13
Journal	Acta Materialia
Volume	47
Issue number	15
DOIs	https://doi.org/10.1016/S1359-6454(99)00255-4
State	Published - Nov 1999
Event	Proceedings of the 1998 ACTA Materiala Workshop on 'Materials Science and Mechanics of Interfaces' - La Jolla, CA, USA Duration: Oct 25 1998 → Oct 30 1998

Funding

Stephen J. Pennycook is thanked for kindly and graciously helping to make this STEM study possible at Oak Ridge National Laboratory and for useful discussions. We kindly thank Roy Benedek for many useful discussions and interactions concerning this study and for serving on the Ph.D. thesis committee of D.A.S. This research was supported by the U.S. Department of Energy at Northwestern University under grant DE-FG02-96ER45597 (D.A.S. and D.N.S.), and at Oak Ridge National Laboratory under contract DE-AC05-84OR21400 (M.F.C.).

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/S1359-6454(99)00255-4

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title = "Atomic-scale structure and chemistry of ceramic/metal interfaces - I. Atomic structure of {222} MgO/Cu (Ag) interfaces",

abstract = "Ceramic/metal (C/M) {222} MgO/Cu (Ag) heterophase interfaces, prepared by internal oxidation, are studied by scanning transmission electron microscopy (STEM). The observed spacing between misfit dislocations (1.45 nm) in a 〈110〉 projection is in agreement with the prediction of Bollmann's geometric O-lattice theory and experimental values in the literature for {222} MgO/Cu interfaces. It is concluded that the {222} MgO/Cu (Ag) interfaces are semicoherent and contain a trigonal network of pure edge misfit dislocations parallel to 〈110〉-type directions, with an (a/6)〈211〉-type Burgers vector. Misfit dislocations are also found in a standoff position at a distance of a single (111) spacing of the Cu (Ag) matrix. Extra intensity at the interface, in some angular dark-field images indicates silver segregation, in agreement with our atom-probe field-ion microscope results. On the metal side of the interface, extra intensity is observed in five atomic layers, which corresponds to a total silver enrichment of approximately 0.7 effective monolayers.",

author = "Shashkov, {D. A.} and Chisholm, {M. F.} and Seidman, {D. N.}",

note = "Funding Information: Stephen J. Pennycook is thanked for kindly and graciously helping to make this STEM study possible at Oak Ridge National Laboratory and for useful discussions. We kindly thank Roy Benedek for many useful discussions and interactions concerning this study and for serving on the Ph.D. thesis committee of D.A.S. This research was supported by the U.S. Department of Energy at Northwestern University under grant DE-FG02-96ER45597 (D.A.S. and D.N.S.), and at Oak Ridge National Laboratory under contract DE-AC05-84OR21400 (M.F.C.).; Proceedings of the 1998 ACTA Materiala Workshop on 'Materials Science and Mechanics of Interfaces' ; Conference date: 25-10-1998 Through 30-10-1998",

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AU - Shashkov, D. A.

AU - Chisholm, M. F.

AU - Seidman, D. N.

N1 - Funding Information: Stephen J. Pennycook is thanked for kindly and graciously helping to make this STEM study possible at Oak Ridge National Laboratory and for useful discussions. We kindly thank Roy Benedek for many useful discussions and interactions concerning this study and for serving on the Ph.D. thesis committee of D.A.S. This research was supported by the U.S. Department of Energy at Northwestern University under grant DE-FG02-96ER45597 (D.A.S. and D.N.S.), and at Oak Ridge National Laboratory under contract DE-AC05-84OR21400 (M.F.C.).

PY - 1999/11

Y1 - 1999/11

N2 - Ceramic/metal (C/M) {222} MgO/Cu (Ag) heterophase interfaces, prepared by internal oxidation, are studied by scanning transmission electron microscopy (STEM). The observed spacing between misfit dislocations (1.45 nm) in a 〈110〉 projection is in agreement with the prediction of Bollmann's geometric O-lattice theory and experimental values in the literature for {222} MgO/Cu interfaces. It is concluded that the {222} MgO/Cu (Ag) interfaces are semicoherent and contain a trigonal network of pure edge misfit dislocations parallel to 〈110〉-type directions, with an (a/6)〈211〉-type Burgers vector. Misfit dislocations are also found in a standoff position at a distance of a single (111) spacing of the Cu (Ag) matrix. Extra intensity at the interface, in some angular dark-field images indicates silver segregation, in agreement with our atom-probe field-ion microscope results. On the metal side of the interface, extra intensity is observed in five atomic layers, which corresponds to a total silver enrichment of approximately 0.7 effective monolayers.

AB - Ceramic/metal (C/M) {222} MgO/Cu (Ag) heterophase interfaces, prepared by internal oxidation, are studied by scanning transmission electron microscopy (STEM). The observed spacing between misfit dislocations (1.45 nm) in a 〈110〉 projection is in agreement with the prediction of Bollmann's geometric O-lattice theory and experimental values in the literature for {222} MgO/Cu interfaces. It is concluded that the {222} MgO/Cu (Ag) interfaces are semicoherent and contain a trigonal network of pure edge misfit dislocations parallel to 〈110〉-type directions, with an (a/6)〈211〉-type Burgers vector. Misfit dislocations are also found in a standoff position at a distance of a single (111) spacing of the Cu (Ag) matrix. Extra intensity at the interface, in some angular dark-field images indicates silver segregation, in agreement with our atom-probe field-ion microscope results. On the metal side of the interface, extra intensity is observed in five atomic layers, which corresponds to a total silver enrichment of approximately 0.7 effective monolayers.

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T2 - Proceedings of the 1998 ACTA Materiala Workshop on 'Materials Science and Mechanics of Interfaces'

Y2 - 25 October 1998 through 30 October 1998

ER -

Atomic-scale structure and chemistry of ceramic/metal interfaces - I. Atomic structure of {222} MgO/Cu (Ag) interfaces

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