Improved consolidation of silicon carbide

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5503303

Freedman, M R; Millard, M L

Alpha silicon carbide powder was consolidated by both dry and wet methods. Dry pressing in a double acting steel die yielded sintered test bars with an average flexural strength of 235.6 MPa with a critical flaw size of approximately 100 micro m. An aqueous slurry pressing technique produced sintered test bars with an average flexural strength of 440.8 MPa with a critical flaw size of approximately 25 micro m. Image analysis revealed a reduction in both pore area and pore size distribution in the slurry pressed sintered test bars. The improvements in the slurry pressed material properties are discussed in terms of reduced agglomeration and improved particle packing during consolidation.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 5503303
• Report Number(s): N-86-24836; NASA-TM-87243; E-2921; CONF-860152-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
AQUEOUS SOLUTIONS
CARBIDES
CARBON COMPOUNDS
DATA
DIES
DISPERSIONS
EXPERIMENTAL DATA
FABRICATION
FLEXURAL STRENGTH
INFORMATION
MECHANICAL PROPERTIES
MIXTURES
NUMERICAL DATA
SILICON CARBIDES
SILICON COMPOUNDS
SINTERING
SLURRIES
SOLUTIONS
SUSPENSIONS
VISCOSITY