Process for producing silicon nitride sintered products having high toughness

Patent · Tue Apr 03 00:00:00 EST 1984

OSTI ID:6510146

Shimamori, T; Hattori, Y; Matsuo, Y

A process for producing a silicon nitride sintered product having high toughness is described, comprising blending from 97 to 57% by weight of metallic silicon powder having a maximum particle size of 25 ..mu..m or less with from 1 to 15% by weight, calculated as TiN, of a TiN powder having a maximum particle size of 20 ..mu..m or less or a powder of titanium component capable of changing into TiN during reaction sintering, and from 2 to 28% by weight of one or more components selected from the group consisting of AlN, Al/sub 2/O/sub 3/, SiO/sub 2/ and oxides of rare earth elements, molding the resulting mixture, carrying out reaction sintering in a nonoxidizing atmosphere of a nitrogen gas or a nitrogen-containing mixed gas, and thereafter resintering in the same atmosphere at a temperature of from 1,600/sup 0/ C. to 2,200/sup 0/ C.

• Assignee: NGK Spark Plug Co., Ltd. (Japan)
• Patent Number(s): US 4440707
• OSTI ID: 6510146
• Resource Relation: Patent Priority Date: Priority date 30 Sep 1981, Japan; Other Information: PAT-APPL-428507
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON NITRIDES
CHEMICAL PREPARATION
FRACTURE PROPERTIES
ALUMINIUM NITRIDES
CHEMICAL REACTIONS
CORUNDUM
MIXING
NITROGEN
POWDERS
PRODUCTION
SILICON OXIDES
SINTERED MATERIALS
SINTERING
TITANIUM NITRIDES
VERY HIGH TEMPERATURE
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
ELEMENTS
FABRICATION
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
SYNTHESIS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties