Development of toughened Si/sub 3/N/sub 4/ composites by glass encapsulated hot isostatic pressure: Final report

Technical Report · Mon Aug 01 00:00:00 EDT 1988

OSTI ID:6747113

Corbin, N D; Willkins, C A

This one-year program was to develop fully dense Si/sub 3/N/sub 4/ matrix SiC whisker composites with enhanced properties over monolithic Si/sub 3/N/sub 4/ materials. Composites were prepared by a Reaction Bonded Silicon Nitride (RBSN) approach followed by Hot Isostatic Pressing (HIPing). The emphasis of this study was to determine the role of whisker aspect ratio, coatings on whiskers, nitridation environments and HIP parameters on composite properties. The ASEA HIP process which has the potential for producing near-net shaped complex geometries was used throughout this program. 26 refs., 22 figs., 7 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA); Norton Co., Northboro, MA (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6747113
• Report Number(s): ORNL/Sub-86-95906/1; ON: DE89001315
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FABRICATION
SILICON NITRIDES
COATINGS
FRACTURE PROPERTIES
INTERFACES
MICROSTRUCTURE
MORPHOLOGY
PROGRESS REPORT
SILICON CARBIDES
SURFACE AREA
TEMPERATURE EFFECTS
WHISKERS
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
DOCUMENT TYPES
MATERIALS
MECHANICAL PROPERTIES
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
SURFACE PROPERTIES
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties