Possible alternative transformation tougheners to zirconia

Journal Article · Thu Dec 01 04:00:00 EST 1988 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1988.tb05786.x· OSTI ID:5833902

Kriven, W M

Several new potential alternative transformation tougheners to zirconia have been identified on the basis of crystallographic considerations and experimental observations. Examples can be found in ceramics, minerals, and components of glass and cement. The displacive transformations exhibit martensitic characteristics of dusting or self-disintegration, and a critical particle size effect operates. Large positive volume changes (/le/12%) accompany the transformations on cooling, in the lanthanide sesquioxides (Ln/sub 2/O/sub 3/), dicalcium silicate (Ca/sub 2/SiO/sub 4/), and nickel sulfide (NiS). High M/sub 2/ temperatures (/le/2000/sup 0/C) in the Ln/sub 2/O/sub 3/ compounds also suggest the possibility of high-temperature transformation toughening. Detrimental negative volume changes are seen in composites with enstatite (MgO x SiO/sub 2/) and the lanthanide borates (LnBO/sub 3/).

• Research Organization: 9523328
• OSTI ID: 5833902
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 71:12; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BORIDES
BORON COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CARBON ADDITIONS
CEMENTS
CHALCOGENIDES
CRITICALITY
CRYSTALLOGRAPHY
DATA
EXPERIMENTAL DATA
GLASS
HIGH TEMPERATURE
INFORMATION
IRON ALLOYS
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MARTENSITE
MATERIALS
MECHANICAL PROPERTIES
NICKEL COMPOUNDS
NICKEL SULFIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SILICATES
SILICON COMPOUNDS
SIZE
SULFIDES
SULFUR COMPOUNDS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES