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

Abstract

A ceramic composition 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 aobut 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:
 [1];  [2]
+ Show Inventor Affiliations
  1. Knoxville, TN
  2. Oak Ridge, TN
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
868260
Patent Number(s):
US 5108670
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; titanium; diboride-chromium; diboride-yttrium; oxide; ceramic; composition; described; consists; essentially; 84; 96; diboride; chromium; aobut; 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; /264/219/501/

Citation Formats

Holcombe, Cressie E, and Dykes, Norman L. Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition. United States: N. p., 1992. Web.
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Holcombe, Cressie E, & Dykes, Norman L. Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition. United States.
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Holcombe, Cressie E, and Dykes, Norman L. 1992. "Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition". United States. https://www.osti.gov/servlets/purl/868260.
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@article{osti_868260,
title = {Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition},
author = {Holcombe, Cressie E and Dykes, Norman L},
abstractNote = {A ceramic composition 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 aobut 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 = {},
url = {https://www.osti.gov/biblio/868260}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}
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Works referenced in this record:

Unusual properties of microwave-sintered yttria-2wt% zirconia
journal, August 1988

Enhanced Thermal Shock Properties of Y 2 O 3 -2 WT.% ZrO 2 Heated Using 2.45 Ghz Radiation
journal, January 1988

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