Atomic scale studies of the chemistry of the Cu/MgO {l_brace}111{r_brace} heterophase interface
- Northwestern Univ., Evanston, IL (United States)
- Argonne National Lab., IL (United States)
The Cu/MgO [111] heterophase interface is studied using a combination of transmission electron microscopy, high resolution electron microscopy and atom-probe field-ion microscopy techniques. Wire and foil specimens of a Cu-2.8 at.% Mg alloy were internally oxidized to produce MgO precipitates at a number density of 5{center_dot}10{sup 15}Cm{sup {minus}3} with a mean diameter of {approx}200 {Angstrom}. The MgO precipitates have a semicoherent interface with the Cu matrix and they exhibit a cube-on-cube orientation relationship. The octahedral-shaped MgO precipitates were analyzed using APFIM by dissecting along a <111> direction on an atomic scale. In this manner an MgO precipitate, with a [111] plane perpendicular to the axis of the APFIM, is uncovered after the Cu matrix has been mass analyzed. It was found that the terminating [222] plane of an MgO precipitate is pure oxygen, and the second [222] plane is pure Mg.
- Research Organization:
- Argonne National Lab., IL (United States); Northwestern Univ., Evanston, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38; FG02-89ER45403
- OSTI ID:
- 10165034
- Report Number(s):
- ANL/CP-75559; CONF-920760-2; ON: DE92017065
- Resource Relation:
- Conference: International symposium on symbolic and algebraic computation,Berkeley, CA (United States),27-29 Jul 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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