Abstract
The chemistry and structure of {222} CdO/Ag (ceramic/metal) heterophase interfaces are determined with sub-nanometer chemical and structural spatial resolution employing atom-probe field-ion and high-resolution electron microscopies. The interfaces are produced in a controlled manner via internal oxidation of a Ag-1.62at%Cd alloy, which results in the formation of CdO precipitates in a Ag matrix. The CdO precipitates are octahedral-shaped with facets on the {222} polar planes, and have a cube-on-cube orientation relationship with the Ag matrix. Atom-probe analyses are made along the chemically-ordered CdO 〈111〉-type directions, thereby perpendicularly intersecting the {222} interfaces. A total of 35 {222} heterophase interfaces is chemically analyzed, of which 19 have the chemical sequence Ag|O|Cd|... and 16 the sequence Ag|Cd|O|.... High resolution electron microscopy analyses reveal that the {222} facet planes of the CdO precipitates contain atomic height ledges, therefore indicating that the preciptates were in a coarsening stage. The combined atom-probe and high-resolution electron microscope results demonstrate that the chemistry of the terminating {222} facet plane of CdO is controlled by coarsening kinetics.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 409-415 |
| Number of pages | 7 |
| Journal | Applied Surface Science |
| Volume | 94-95 |
| DOIs | |
| State | Published - Jan 1 1996 |
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ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films
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The chemistry and structure of {222} CdO/Ag heterophase interfaces on an atomic scale. / Chan, D. K.; Seidman, David N; Merkle, K. L.
In: Applied Surface Science, Vol. 94-95, 01.01.1996, p. 409-415.Research output: Contribution to journal › Article
TY - JOUR
T1 - The chemistry and structure of {222} CdO/Ag heterophase interfaces on an atomic scale
AU - Chan, D. K.
AU - Seidman, David N
AU - Merkle, K. L.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - The chemistry and structure of {222} CdO/Ag (ceramic/metal) heterophase interfaces are determined with sub-nanometer chemical and structural spatial resolution employing atom-probe field-ion and high-resolution electron microscopies. The interfaces are produced in a controlled manner via internal oxidation of a Ag-1.62at%Cd alloy, which results in the formation of CdO precipitates in a Ag matrix. The CdO precipitates are octahedral-shaped with facets on the {222} polar planes, and have a cube-on-cube orientation relationship with the Ag matrix. Atom-probe analyses are made along the chemically-ordered CdO 〈111〉-type directions, thereby perpendicularly intersecting the {222} interfaces. A total of 35 {222} heterophase interfaces is chemically analyzed, of which 19 have the chemical sequence Ag|O|Cd|... and 16 the sequence Ag|Cd|O|.... High resolution electron microscopy analyses reveal that the {222} facet planes of the CdO precipitates contain atomic height ledges, therefore indicating that the preciptates were in a coarsening stage. The combined atom-probe and high-resolution electron microscope results demonstrate that the chemistry of the terminating {222} facet plane of CdO is controlled by coarsening kinetics.
AB - The chemistry and structure of {222} CdO/Ag (ceramic/metal) heterophase interfaces are determined with sub-nanometer chemical and structural spatial resolution employing atom-probe field-ion and high-resolution electron microscopies. The interfaces are produced in a controlled manner via internal oxidation of a Ag-1.62at%Cd alloy, which results in the formation of CdO precipitates in a Ag matrix. The CdO precipitates are octahedral-shaped with facets on the {222} polar planes, and have a cube-on-cube orientation relationship with the Ag matrix. Atom-probe analyses are made along the chemically-ordered CdO 〈111〉-type directions, thereby perpendicularly intersecting the {222} interfaces. A total of 35 {222} heterophase interfaces is chemically analyzed, of which 19 have the chemical sequence Ag|O|Cd|... and 16 the sequence Ag|Cd|O|.... High resolution electron microscopy analyses reveal that the {222} facet planes of the CdO precipitates contain atomic height ledges, therefore indicating that the preciptates were in a coarsening stage. The combined atom-probe and high-resolution electron microscope results demonstrate that the chemistry of the terminating {222} facet plane of CdO is controlled by coarsening kinetics.
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U2 - 10.1016/0169-4332(95)00404-1
DO - 10.1016/0169-4332(95)00404-1
M3 - Article
VL - 94-95
SP - 409
EP - 415
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -