Zirconia ceramic article toughened with SIC whiskers
Description
A ceramic composite is described characterized by improved fracture toughness comprising a matrix phase consisting essentially of tetragonal ZrO/sub 2/ and a ZrO/sub 2/ stabilizer selected from the group consisting of MgO, CaO, Y/sub 2/O/sub 3/, and oxides of rare earth elements from the group: La, Ce Nd, Sm, Gd, Dy, Er and Yb and a whisker reinforcement phase constituting 5-20 volume percent of the composite and consisting of silicon carbide whiskers, the whiskers having a monocrystalline structure, a diameter in the range of 0.5-3 μm, a length in the range of 10-30 μm, and an aspect ratio not exceeding about 20, the composite exhibiting a fracture toughness (K/sub IC/) at 250C at least 1.25 times the fracture toughness of the matrix phase when free of the whisker reinforcement phase
Availability note (English)
Patent and Trademark Office, Box 9, Washington, DC 20232.Additional details
Publishing Information
- Imprint Pagination
- vp.
- IPC:
- Int. Cl. C04B 35/48; C04B 35/56.
- IPC
- Int. Cl. C04B 35/48; C04B 35/56.
- Patent number
- US patent document 4,804,643/A/
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20055658
- Subject category
- S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CALCIUM OXIDES; CERAMICS; CERIUM OXIDES; CHEMICAL COMPOSITION; DYSPROSIUM OXIDES; ERBIUM OXIDES; FRACTURE PROPERTIES; GADOLINIUM OXIDES; LANTHANUM OXIDES; MAGNESIUM OXIDES; MATRIX MATERIALS; NEODYMIUM OXIDES; SAMARIUM OXIDES; SILICON CARBIDES; WHISKERS; YTTERBIUM OXIDES; YTTRIUM OXIDES; ZIRCONIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; CRYSTALS; DYSPROSIUM COMPOUNDS; ERBIUM COMPOUNDS; GADOLINIUM COMPOUNDS; LANTHANUM COMPOUNDS; MAGNESIUM COMPOUNDS; MATERIALS; MECHANICAL PROPERTIES; MONOCRYSTALS; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTERBIUM COMPOUNDS; YTTRIUM COMPOUNDS; ZIRCONIUM COMPOUNDS