Deformation and oxygen diffusion in Mn/sub 1-delta/O

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7034561

Routbort, J L; Goretta, K C

The steady-state flow stress of MnO single crystals has been measured from 900 to 1400/sup 0/C over a wide range of oxygen partial pressures, p/sub O/sub 2//, from 10/sup -11/ to 10/sup 2/ Pa. Diffusion of /sup 18/O in MnO has been measured in the temperature range of 1100 to 1400/sup 0/C at a p/sub O/sub 2// = 1 x 10/sup -6/ Pa. It has been firmly established that the recovery processes are controlled by dislocation climb which is governed by diffusion of anion defects. Vacancies or interstitials, whose charge depends on temperature, are operative depending on the p/sub O/sub 2//. When the MnO data are compared with those of other isostructural nonstoichiometric oxides, a very consistent description of the relationship between the minority point defects and steady-state deformation emerges.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7034561
• Report Number(s): CONF-8608139-1; ON: DE87001520
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ATOM TRANSPORT
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
CRYSTALS
DEFORMATION
DIFFUSION
EVEN-EVEN NUCLEI
ISOTOPES
LIGHT NUCLEI
MANGANESE COMPOUNDS
MANGANESE OXIDES
MONOCRYSTALS
NEUTRAL-PARTICLE TRANSPORT
NICKEL COMPOUNDS
NICKEL OXIDES
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RADIATION TRANSPORT
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS