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Title: Zirconia ceramic article toughened with SIC whiskers

Abstract

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 ..mu..m, a length in the range of 10-30 ..mu..m, and an aspect ratio not exceeding about 20, the composite exhibiting a fracture toughness (K/sub IC/) at 25/sup 0/C at least 1.25 times the fracture toughness of the matrix phase when free of the whisker reinforcement phase.

Inventors:
; ; ;
Publication Date:
OSTI Identifier:
6265458
Patent Number(s):
US 4804643
Application Number:
TRN: 89-012644
Assignee:
Corning Glass Works, Corning, NY
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 24 Apr 1987
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CERAMICS; CHEMICAL COMPOSITION; ZIRCONIUM OXIDES; CALCIUM OXIDES; CERIUM OXIDES; 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; 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; 360203* - Ceramics, Cermets, & Refractories- Mechanical Properties; 400201 - Chemical & Physicochemical Properties

Citation Formats

Chyung, K, Gadkaree, K P, Ketcham, T D, and Wusirika, R R. Zirconia ceramic article toughened with SIC whiskers. United States: N. p., 1989. Web.
Chyung, K, Gadkaree, K P, Ketcham, T D, & Wusirika, R R. Zirconia ceramic article toughened with SIC whiskers. United States.
Chyung, K, Gadkaree, K P, Ketcham, T D, and Wusirika, R R. Tue . "Zirconia ceramic article toughened with SIC whiskers". United States.
@article{osti_6265458,
title = {Zirconia ceramic article toughened with SIC whiskers},
author = {Chyung, K and Gadkaree, K P and Ketcham, T D and Wusirika, R R},
abstractNote = {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 ..mu..m, a length in the range of 10-30 ..mu..m, and an aspect ratio not exceeding about 20, the composite exhibiting a fracture toughness (K/sub IC/) at 25/sup 0/C at least 1.25 times the fracture toughness of the matrix phase when free of the whisker reinforcement phase.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {2}
}