Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same

Title: Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same

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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:

Holcombe, Cressie E ^[1]; Dykes, Norman L ^[2]

Knoxville, TN
Oak Ridge, TN

Issue Date:: 1991-01-01

Research Org.:: LOCKHEED MARTIN ENRGY SYST INC

OSTI Identifier:: 867805

Patent Number(s):: 5013694

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:: 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.

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                    Holcombe, Cressie E, & Dykes, Norman L. Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same.  United States.

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                    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.

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@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}

}

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