Ceramic impregnated superabrasives

Title: Ceramic impregnated superabrasives

Abstract

A superabrasive fracture resistant compact is formed by depositing successive layers of ceramic throughout the network of open pores in a thermally stable self-bonded polycrystalline diamond or cubic boron nitride preform. The void volume in the preform is from approximately 2 to 10 percent of the volume of the preform, and the average pore size is below approximately 3000 nanometers. The preform is evacuated and infiltrated under at least about 1500 pounds per square inch pressure with a liquid pre-ceramic polymerizable precursor. The precursor is infiltrated into the preform at or below the boiling point of the precursor. The precursor is polymerized into a solid phase material. The excess is removed from the outside of the preform, and the polymer is pyrolized to form a ceramic. The process is repeated at least once more so as to achieve upwards of 90 percent filling of the original void volume. When the remaining void volume drops below about 1 percent the physical properties of the compact, such as fracture resistance, improve substantially. Multiple infiltration cycles result in the deposition of sufficient ceramic to reduce the void volume to below 0.5 percent. The fracture resistance of the compacts in which the pores aremore »« less

Inventors:: Radtke, Robert P.; Sherman, Andrew

Issue Date:: 2009-02-10

Research Org.:: US Department of Energy (USDOE), Washington DC (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1176191

Patent Number(s):: 7488537

Application Number:: 10/931,671

Assignee:: Radtke, Robert P., Kingwood, TX (United States)

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

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B41/5035 - {Silica}
C04B2235/3873 - Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
C04B41/4535 - {applied as a solution, emulsion, dispersion or suspension}
C04B2235/80 - Phases present in the sintered or melt-cast ceramic products other than the main phase
C04B41/5057 - {Carbides}
C04B2235/483 - Si-containing organic compounds, e.g. silicone resins,
C04B35/5831 - based on cubic boron nitrides {or Wurtzitic boron nitrides, including crystal structure transformation of powder}
C04B41/457 - {Non-superficial impregnation or infiltration of the substrate}
C04B41/522 - {Multiple coatings, for one of the coatings of which at least one alternative is described}
C04B41/5059 - {Silicon carbide}
C04B2235/3826 - Silicon carbides
C04B38/00 - Porous mortars, concrete, artificial stone or ceramic ware

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/249967 - Inorganic matrix in void-containing component

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/96 - Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
C04B2235/3891 - Silicides, e.g. molybdenum disilicide, iron silicide

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/30 - Self-sustaining carbon mass or layer with impregnant or other layer
Y10T428/249957 - Inorganic impregnant

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/52 - based on carbon, e.g. graphite

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/249969 - Of silicon-containing material [e.g., glass, etc.]

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/616 - Liquid infiltration of green bodies or pre-forms
C04B41/4521 - {application under increased pressure}
C04B41/89 - for obtaining at least two superposed coatings having different compositions
C04B41/52 - Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation}
C04B2235/427 - Diamond
C04B41/009 - {characterised by the material treated}
C04B41/4554 - {the coating or impregnating material being an organic or organo-metallic precursor of an inorganic material}
C04B2235/3895 - Non-oxides with a defined oxygen content, e.g. SiOC, TiON

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DOE Contract Number:: FC276-97FT34368

Resource Type:: Patent

Resource Relation:: Patent File Date: 2004 Sep 01

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Radtke, Robert P., and Sherman, Andrew. Ceramic impregnated superabrasives.  United States: N. p., 2009. 
        Web.

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                    Radtke, Robert P., & Sherman, Andrew. Ceramic impregnated superabrasives.  United States.

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                    Radtke, Robert P., and Sherman, Andrew. Tue .  
        "Ceramic impregnated superabrasives".  United States.  https://www.osti.gov/servlets/purl/1176191.

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@article{osti_1176191,

  title        = {Ceramic impregnated superabrasives},

  author       = {Radtke, Robert P. and Sherman, Andrew},

  abstractNote = {A superabrasive fracture resistant compact is formed by depositing successive layers of ceramic throughout the network of open pores in a thermally stable self-bonded polycrystalline diamond or cubic boron nitride preform. The void volume in the preform is from approximately 2 to 10 percent of the volume of the preform, and the average pore size is below approximately 3000 nanometers. The preform is evacuated and infiltrated under at least about 1500 pounds per square inch pressure with a liquid pre-ceramic polymerizable precursor. The precursor is infiltrated into the preform at or below the boiling point of the precursor. The precursor is polymerized into a solid phase material. The excess is removed from the outside of the preform, and the polymer is pyrolized to form a ceramic. The process is repeated at least once more so as to achieve upwards of 90 percent filling of the original void volume. When the remaining void volume drops below about 1 percent the physical properties of the compact, such as fracture resistance, improve substantially. Multiple infiltration cycles result in the deposition of sufficient ceramic to reduce the void volume to below 0.5 percent. The fracture resistance of the compacts in which the pores are lined with formed in situ ceramic is generally at least one and one-half times that of the starting preforms.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2009},

  month        = {2}

}

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Works referenced in this record:

Thermal redistribution reactions of Blackglas? ceramic
journal, January 2001

Wang, Feng; Apple, Tom; Gill, William N.
Journal of Applied Polymer Science, Vol. 81, Issue 1
https://doi.org/10.1002/app.1424

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Similar Records

Title: Ceramic impregnated superabrasives

Abstract

Citation Formats

Thermal redistribution reactions of Blackglas? ceramic journal, January 2001

Thermal redistribution reactions of Blackglas? ceramic
journal, January 2001