Refractory composites of alumina and boron nitride

Patent · Tue Feb 27 04:00:00 EST 1990

OSTI ID:6905898

Shaffer, G W

This patent describes a composite produced by heating and compressing a mixture of particulate alumina and boron nitride. The composite consists essentially of between about 50 and about 90 weight percent alumina having a purity of at least 99.90 weight percent, and between about 10 to about 50 weight percent boron nitride having a purity of at least 99 weight percent. The composite has a density not more than about 93% of the theoretical density, and a Rockwell R hardness less than 130.

• Assignee: Union Carbide Corp., Danbury, CT
• Patent Number(s): US 4904625; A
• Application Number: PPN: US 6-914931A
• OSTI ID: 6905898
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BORON COMPOUNDS
BORON NITRIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COMPOSITE MATERIALS
HARDNESS
MATERIALS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
QUANTITY RATIO
REFRACTORIES
SYNTHESIS