Sintering, microstructural, radiographic, and strength characterization of a high-purity Si/sub 3/N/sub 4/-based composition

Conference · Fri Aug 01 04:00:00 EDT 1986 · Ceram. Eng. Sci. Proc.; (United States)

OSTI ID:6909971

Kiser, J D; Sanders, W A; Mieskowski, D M

A commercially available high purity alpha-Si/sub 3/N/sub 4/ powder (UBE SN-E10) was characterized, milled with additives, and sintered in a high-pressure nitrogen atmosphere at temperatures ranging from 1750 to 2140 C. The composition selected for this study has been previously examined using a different alpha-Si/sub 3/N/sub 4/ powder. Densification behavior, microstructure characteristics, X-radiographic appearance, room- and high-temperatures flexural strength, and fracture-initiating flaw sites were determined. The high-temperature flexural strengths significantly exceeded those observed in the earlier studies using an identical composition (different alpha-Si/sub 3/N/sub 4/ powder) and similar processing techniques. 23 references.

• OSTI ID: 6909971
• Report Number(s): CONF-860152-
• Conference Information: Journal Name: Ceram. Eng. Sci. Proc.; (United States) Journal Volume: 7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CRACKS
CRYSTAL STRUCTURE
FABRICATION
FLEXURAL STRENGTH
MECHANICAL PROPERTIES
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
SILICON NITRIDES
SINTERING