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Title: Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition

Abstract

A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness. No Drawings

Inventors:
;
Publication Date:
OSTI Identifier:
7284177
Patent Number(s):
US 5108670; A
Application Number:
PPN: US 7-641231
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; EDB-94-081832
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Patent File Date: 14 Jan 1991
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMIUM BORIDES; MECHANICAL PROPERTIES; SINTERING; TITANIUM BORIDES; TITANIUM OXIDES; YTTRIUM OXIDES; CHEMICAL COMPOSITION; DENSITY; DISPERSIONS; PARTICLE SIZE; BORIDES; BORON COMPOUNDS; CHALCOGENIDES; CHROMIUM COMPOUNDS; FABRICATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SIZE; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360203 - Ceramics, Cermets, & Refractories- Mechanical Properties

Citation Formats

Holcombe, C.E., and Dykes, N.L. Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition. United States: N. p., 1992. Web.
Holcombe, C.E., & Dykes, N.L. Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition. United States.
Holcombe, C.E., and Dykes, N.L. Tue . "Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition". United States.
@article{osti_7284177,
title = {Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition},
author = {Holcombe, C.E. and Dykes, N.L.},
abstractNote = {A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness. No Drawings},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {4}
}