Dense cermets containing fine grained ceramics and their manufacture

Patent · Tue Sep 09 04:00:00 EDT 1986

OSTI ID:5283204

King, H L

This patent describes a method of producing a ceramic-metal composite (cermet) containing boride-oxide ceramic having components of a first metal boride and a second metal oxide, which ceramic is in mixture in the cermet with elemental metal of the second metal, wherein the cermet is produced by sintering a reaction mixture of the first metal oxide, boron oxide and the elemental second metal. The improvement consists of: combining for the reaction mixture; A. (a) first metal oxide; (b) boron oxide; (c) ceramic component in very finely divided form; and (d) elemental second metal in very finely divided form and in an amount of at least a 100 percent molar excess beyond that amount stoichiometrically required to produce the second metal oxide during sintering; and B. sintering the reaction mixture in inert gas atmosphere.

• Assignee: Eltech Systems Corp., Boca Raton, FL
• Patent Number(s): US 4610726
• OSTI ID: 5283204
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BORON COMPOUNDS
BORON OXIDES
CERAMICS
CERMETS
CHALCOGENIDES
CHEMICAL PREPARATION
COMPOSITE MATERIALS
DENSITY
DISPERSIONS
FABRICATION
INERT ATMOSPHERE
MATERIALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
SINTERING
STOICHIOMETRY
SYNTHESIS