Positron-annihilation measurements of vacancy formation in Ni and Ni(Ge)
Conference
·
OSTI ID:6338711
Vacancy formation in Ni and in dilute Ni(Ge) alloys was studied under thermal equilibrium conditions using positron-annihilation Doppler broadening. A monovacancy formation enthalpy of 1.8 +- 0.1 eV was determined for pure Ni; combining this result with that from previous tracer self-diffusion measurements, a monovacancy migration enthalpy of 1.1 +- 0.1 eV was also deduced. Analysis of the vacancy formation measurements in Ni(0.3 at.% Ge) and Ni(1 at.% Ge) yielded a value for the vacancy-Ge binding enthalpy of 0.20 +- 0.04 eV.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6338711
- Report Number(s):
- CONF-820434-18; ON: DE83007969
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
BINDING ENERGY
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
ENERGY
ENTHALPY
FORMATION HEAT
GERMANIUM ALLOYS
METALS
NICKEL
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
POINT DEFECTS
REACTION HEAT
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
VACANCIES
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
BINDING ENERGY
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
ENERGY
ENTHALPY
FORMATION HEAT
GERMANIUM ALLOYS
METALS
NICKEL
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
POINT DEFECTS
REACTION HEAT
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
VACANCIES