High-temp toughening and creep studies. Final report, 1 June 1985-28 February 1989

Technical Report · Thu May 11 04:00:00 EDT 1989

OSTI ID:5612411

Kriven, W M

Early in 1985, the lanthanide sesquioxides (Ln{sub 2}O{sub 3}) were identified as potential high-temperature transformation tougheners alternative to zirconia (ZrO{sub 2}). Their 8-10% volume increase accompanying the monoclinic (B) to cubic (C) transformation suggested that they should be more powerful than ZrO{sub 2}. In addition, the Ms temperature was raised up to 2200 C indicating that, based on thermodynamics alone, transformation toughening up to this temperature should be possible. Hence a proposal was written with the aim of transformation toughening silicon carbide (SiC) with dispersions of monoclinic dysprosia particles giving a microstructure analogous to Zirconia-toughened-alumina (ZTA).

• Research Organization: Illinois Univ., Urbana, IL (USA). Dept. of Materials Science and Engineering
• OSTI ID: 5612411
• Report Number(s): AD-A-208714/6/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANNEALING
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CRACKS
CREEP
CRYSTAL STRUCTURE
DISPERSIONS
DOCUMENT TYPES
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELEMENTAL MINERALS
ELEMENTS
FABRICATION
FRACTURE PROPERTIES
GRAPHITE
HEAT TREATMENTS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
MINERALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
RARE EARTH COMPOUNDS
SILICON CARBIDES
SILICON COMPOUNDS
SILICON OXIDES
SINTERING
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES