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:
- Issue Date:
- OSTI Identifier:
- 7284177
- Patent Number(s):
- 5108670
- Application Number:
- PPN: US 7-641231
- Assignee:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
- 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 = {Tue Apr 28 00:00:00 EDT 1992},
month = {Tue Apr 28 00:00:00 EDT 1992}
}