Interdiffusion in the Er/sub 2/O/sub 3/-HfO/sub 2/ system
The interdiffusion coefficient shows an approximately exponential composition dependence over the range 2 to 18 mole percent HfO/sub 2/ in Er/sub 2/O/sub 3/. This composition dependence increases as temperature increases. Extrapolation of interdiffusion coefficient data to N/sub HfO/sub 2/ = 0 allows rough estimation of the impurity diffusion coefficients for Hf in essentially pure Er/sub 2/O/sub 3/. These coefficients are lower in magnitude and higher in temperature dependence than published Er self-diffusion coefficients in undoped Er/sub 2/O/sub 3/. The temperature dependence of the interdiffusion coefficient increases with HfO/sub 2/ concentration in the range 2 to 12 mole percent HfO/sub 2/, and decreases in the range 12 to 18 mole percent HfO/sub 2/.
- Research Organization:
- Ames Lab., Iowa (USA)
- Sponsoring Organization:
- US Energy Research and Development Administration (ERDA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 7142760
- Report Number(s):
- IS-T-727
- Country of Publication:
- United States
- Language:
- English
Similar Records
Self-diffusion of Er and Hf inpure and HfO/sub 2/-doped polycrystalline Er/sub 2/O/sub 3/. [Hf-175 and Er-169]
Electrical conductivities of single phase fluorite structure compositions in the HfO/sub 2/-Er/sub 2/O/sub 3/ and HfO/sub 2/-Er/sub 2/O/sub 3/-Ta/sub 2/O/sub 5/ systems
Electrical conductivities of Er/sub 2/O/sub 3/ stabilized HfO/sub 2/ solid solutions
Technical Report
·
Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:6516086
Electrical conductivities of single phase fluorite structure compositions in the HfO/sub 2/-Er/sub 2/O/sub 3/ and HfO/sub 2/-Er/sub 2/O/sub 3/-Ta/sub 2/O/sub 5/ systems
Technical Report
·
Sun Jul 01 00:00:00 EDT 1984
·
OSTI ID:6831621
Electrical conductivities of Er/sub 2/O/sub 3/ stabilized HfO/sub 2/ solid solutions
Journal Article
·
Thu Jan 31 23:00:00 EST 1985
· J. Electrochem. Soc.; (United States)
·
OSTI ID:6392578
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
DIFFUSION
ERBIUM COMPOUNDS
ERBIUM OXIDES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
IMPURITIES
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
DIFFUSION
ERBIUM COMPOUNDS
ERBIUM OXIDES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
IMPURITIES
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE