Influence of point defects on grain boundary diffusion in oxides

Technical Report · Fri Mar 15 00:00:00 EST 1991

DOI:https://doi.org/10.2172/7082131· OSTI ID:7082131

Stubican, V S

The influence of point defects on grain boundary diffusion of Co ions in NiO was studied using polycrystalline films and bicrystals. Grain boundary diffusion was studied at 750 C at oxygen partial pressure. Two diffusion regions were found. At low oxygen pressures, extrinsic diffusion was observed. Above oxygen pressure of 10{sup {minus}7}, influence of intrinsic point defects was detected. It was determined that grain boundary diffusion was > 3 orders of magnitude faster than volume diffusion. However, it seems that grain boundary diffusion is influenced by the point defects in a similar way as the volume diffusion. 4 figs.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-90ER45414
• OSTI ID: 7082131
• Report Number(s): DOE/ER/45414-T1; ON: DE93002864
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT 57
DIFFUSION
NICKEL OXIDES
ATOM TRANSPORT
BICRYSTALS
FILMS
GRAIN BOUNDARIES
OXYGEN
PARTIAL PRESSURE
POINT DEFECTS
POLYCRYSTALS
PROGRESS REPORT
TEMPERATURE RANGE 1000-4000 K
BETA DECAY RADIOISOTOPES
CHALCOGENIDES
COBALT ISOTOPES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DAYS LIVING RADIOISOTOPES
DOCUMENT TYPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MICROSTRUCTURE
NEUTRAL-PARTICLE TRANSPORT
NICKEL COMPOUNDS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIATION TRANSPORT
RADIOISOTOPES
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
360104* - Metals & Alloys- Physical Properties