Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same
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.
- Inventors:
-
- Knoxville, TN
- Oak Ridge, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 867805
- Patent Number(s):
- 5013694
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- titanium; diboride-chromium; diboride-yttrium; oxide; ceramic; composition; process; described; consists; essentially; 84; 96; diboride; chromium; 15; yttrium-titanium-oxide; method; comprises; following; steps; step; 1-a; consolidated; containing; stoichiometric; quantities; provided; 2-the; enclosed; contact; thermally; insulated; package; yttria; granules; thickness; inches; 3-the; heated; microwave; oven; energy; temperature; equal; 900; degrees; centigrade; sinter; uniformly; disperse; particles; size; range; 12; microns; throughout; forming; densified; consisting; resulting; enhanced; fracture; toughness; hardness; chromium diboride; stoichiometric quantities; size range; titanium diboride; microwave oven; composition comprises; ceramic composition; fracture toughness; microwave energy; consisting essentially; consists essentially; titanium oxide; oxide ceramic; degrees centigrade; wave energy; thermally insulated; following steps; temperature equal; composition consists; titanium diboride-chromium; uniformly disperse; diboride-yttrium titanium; diboride-chromium diboride-yttrium; /501/219/
Citation Formats
Holcombe, Cressie E, and Dykes, Norman L. Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same. United States: N. p., 1991.
Web.
Holcombe, Cressie E, & Dykes, Norman L. Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same. United States.
Holcombe, Cressie E, and Dykes, Norman L. Tue .
"Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same". United States. https://www.osti.gov/servlets/purl/867805.
@article{osti_867805,
title = {Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same},
author = {Holcombe, Cressie E and Dykes, Norman 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}