Mechanical properties of the directionally solidified MgO--MgAl/sub 2/O/sub 4/ eutectic

Conference · Thu Jan 01 04:00:00 EST 1976 · J. Am. Ceram. Soc.; (United States)

OSTI ID:7355382

Kennard, F L; Bradt, R C; Stubican, V S

Mechanical properties from room temperature to 1600/sup 0/C are reported for the directionally solidifed MgO--MgAl/sub 2/O/sub 4/ eutectic. Strength, although modest, showed little decrease to 1600/sup 0/C, exhibited totally elastic behavior, and appeared to be related to colony size rather than fiber spacing. Work-of-fracture was low, increased only moderately at 1600/sup 0/C and failed to reveal any potential for the classical toughening of fiber composites. Microhardness, which exhibited classical Petch behavior related to the fiber spacing, exceeded the values for the constituent phases. It was concluded that these microstructures inhibit plastic flow and may prove most useful at high temperatures.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 7355382
• Conference Information: Journal Name: J. Am. Ceram. Soc.; (United States) Journal Volume: 59:3-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DISPERSIONS
EUTECTICS
FRACTURE PROPERTIES
HARDNESS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MICROHARDNESS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SOLIDIFICATION
VERY HIGH TEMPERATURE