Synthesis, characterization, and properties of nanophase ceramics
Ultrafine-grained ceramics have been synthesized by the production of ultrafine (2-20 nm) particles, using the gas-condensation method, followed by their in-situ, ultra-high vacuum consolidation at room temperature. These new nanophase ceramics have properties that are significantly improved relative to those of their coarser-grained, conventionally-prepared counterparts. For example, nanophase rutile (TiO/sub 2/) with an initial mean grain diameter of 12 nm sinters at 400 to 600/degree/C lower temperatures than conventional powders, without the need for compacting or sintering aids. The sintered nanophase rutile exhibits both improved microhardness and fracture characteristics. These property improvements result from the reduced scale of the grains and the increased cleanliness of the particle surfaces and the subsequently-formed grain boundaries. Research completed on the synthesis, characterization, and properties of nanophase ceramics is reviewed and the potential for using the nanophase synthesis method for engineering new and/or improved ceramics and composites is considered. 21 refs., 5 figs.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6292826
- Report Number(s):
- CONF-881155-60; ON: DE89009863
- Resource Relation:
- Journal Volume: 132; Conference: Fall meeting of the Materials Research Society, Boston, MA, USA, 28 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CERAMICS
SYNTHESIS
ALUMINIUM OXIDES
GRAIN SIZE
HARDNESS
HIGH VACUUM
MAGNESIUM OXIDES
MICROSTRUCTURE
PARTICLE SIZE
RAMAN SPECTROSCOPY
SINTERING
TITANIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL STRUCTURE
FABRICATION
LASER SPECTROSCOPY
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
SIZE
SPECTROSCOPY
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies