Joining of porous silicon carbide bodies

Bates, Carl H; Couhig, John T; Pelletier, Paul J

Title: Joining of porous silicon carbide bodies

Full Record
Other Related Research

Abstract

A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.

Inventors:

Bates, Carl H ^[1]; Couhig, John T ^[1]; Pelletier, Paul J ^[2]

Worcester, MA
Thompson, CT

Issue Date:: 1990-05-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 867359

Patent Number(s):: 4921554

Application Number:: 07/250,018

Assignee:: Norton Company (Worcester, MA)

Patent Classifications (CPCs):: C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

Show more

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2237/365 - Silicon carbide
C04B2237/083 - Carbide interlayers, e.g. silicon carbide interlayers
C04B2237/567 - made of metal
C04B35/6455 - {Hot isostatic pressing}
C04B37/005 - {consisting of glass or ceramic material}
C04B2237/61 - Joining two substrates of which at least one is porous by infiltrating the porous substrate with a liquid, such as a molten metal, causing bonding of the two substrates, e.g. joining two porous carbon substrates by infiltrating with molten silicon

Show less

DOE Contract Number:: 86X-SB045C

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: joining; porous; silicon; carbide; bodies; method; disclosed; entails; utilizing; aqueous; slip; similar; form; including; sintering; aids; binder; initially; join; composite; structure; subjected; cold; isostatic; pressing; joint; handling; strength; pressureless; final; strong; bond; optionally; hot; improve; densify; result; indistinguishable; pieces; joins; strong bond; composite structure; porous silicon; silicon carbide; hot isostatic; isostatic pressing; pressureless sintering; porous bodies; sintering aids; cold isostatic; carbide bodies; /156/419/

Citation Formats


                    Bates, Carl H, Couhig, John T, and Pelletier, Paul J. Joining of porous silicon carbide bodies.  United States: N. p., 1990. 
        Web.

Copy to clipboard


                    Bates, Carl H, Couhig, John T, & Pelletier, Paul J. Joining of porous silicon carbide bodies.  United States.

Copy to clipboard


                    Bates, Carl H, Couhig, John T, and Pelletier, Paul J. Tue .  
        "Joining of porous silicon carbide bodies".  United States.  https://www.osti.gov/servlets/purl/867359.

Copy to clipboard


                    
@article{osti_867359,

  title        = {Joining of porous silicon carbide bodies},

  author       = {Bates, Carl H and Couhig, John T and Pelletier, Paul J},

  abstractNote = {A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1990},

  month        = {5}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Diorganosilacetylene-alt-diorganosilvinylene polymers and a process densifying porous silicon-carbide bodies

Patent Barton, Thomas J [Ames, IA]; Ijadi-Maghsoodi, Sina [Ames, IA]; Pang, Yi [Ames, IA]

The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R.sup.1)(R.sup.2)Si--C.tbd.C--(R.sup.3)(R.sup.4)Si--CH=CH--].sub.n-- , wherein n.gtoreq.2; and each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.
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
Diffusion bonded silicon carbide having iridium and hermetic silicon carbide-iridium bonds

Patent Cockeram, Brian V.

Disclosed is a hermetic bond for a joint including a first layer of silicon carbide; a second layer of silicon carbide; and a bonding layer positioned between the first layer and the second layer, wherein the bonding layer includes an iridium layer, a first reaction zone positioned between the iridium foil layer and the first layer, and a second reaction zone positioned between the iridium foil layer and the second layer, wherein the first reaction zone and the second reaction zone include iridium silicides.
Full Text Available
Diffusion bonding of silicon carbide using iridium and hermetic silicon carbide-iridium bonds

Patent Cockeram, Brian V.

An exemplary method of bonding of silicon carbide and objects having a hermetic silicon carbide-iridium-silicon carbide bond. The method includes the steps of inserting an iridium foil between two SiC layers; heating the iridium foil and SiC layers at a temperature of 1500 C in a vacuum of <10−5 ton; applying a pressure between 1 ksi and 7 ksi to the iridium foil and SiC layers; maintaining the temperature and pressure for 6-10 hours; and forming a hermetic seal having a leak rate <3×10−9 cm3/sec between the iridium foil and the two SiC layers. The SiC-iridium bonds lack cracks andmore » are hermetic. « less
Full Text Available
Silicon nitride/silicon carbide composite densified materials prepared using composite powders

Patent Dunmead, Stephen D [Midland, MI]; Weimer, Alan W [Midland, MI]; Carroll, Daniel F [Midland, MI]; ...

Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
Full Text Available

Similar Records