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

Full Record
Other Related Research

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.:: 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

Show more

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/58071 - {based on titanium borides}

Show less

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.

Copy to clipboard


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

Copy to clipboard


                    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.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

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

Patent Holcombe, Cressie E [Knoxville, TN]; Dykes, Norman L [Oak Ridge, TN]

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. Stepmore »« less
Full Text Available
Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition

Patent Holcombe, C E; Dykes, N L

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--Themore »« less
Laminated composite of magnetic alloy powder and ceramic powder and process for making same

Patent Moorhead, Arthur J [Knoxville, TN]; Kim, Hyoun-Ee [Seoul, KR]

A laminated composite structure of alternating metal powder layers, and layers formed of an inorganic bonding media powder, and a method for manufacturing same are discosed. The method includes the steps of assembling in a cavity alternating layers of a metal powder and an inorganic bonding media of a ceramic, glass, and glass-ceramic. Heat, with or without pressure, is applied to the alternating layers until the particles of the metal powder are sintered together and bonded into the laminated composite structure by the layers of sintered inorganic bonding media to form a strong composite structure. The method finds particular applicationmore »« less
Full Text Available
Composite materials and bodies including silicon carbide and titanium diboride and methods of forming same

Patent Lillo, Thomas M.; Chu, Henry S.; Harrison, William M.; ...

Methods of forming composite materials include coating particles of titanium dioxide with a substance including boron (e.g., boron carbide) and a substance including carbon, and reacting the titanium dioxide with the substance including boron and the substance including carbon to form titanium diboride. The methods may be used to form ceramic composite bodies and materials, such as, for example, a ceramic composite body or material including silicon carbide and titanium diboride. Such bodies and materials may be used as armor bodies and armor materials. Such methods may include forming a green body and sintering the green body to a desirablemore »« less
Full Text Available
Titanium diboride ceramic fiber composites for Hall-Heroult cells

Patent Besmann, Theodore M [Knoxville, TN]; Lowden, Richard A [Knoxville, TN]

An improved cathode structure for Hall-Heroult cells for the electrolytic production of aluminum metal. This cathode structure is a preform fiber base material that is infiltrated with electrically conductive titanium diboride using chemical vapor infiltration techniques. The structure exhibits good fracture toughness, and is sufficiently resistant to attack by molten aluminum. Typically, the base can be made from a mat of high purity silicon carbide fibers. Other ceramic or carbon fibers that do not degrade at temperatures below about 1000 deg. C can be used.
Full Text Available

Similar Records