skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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 » lined with formed in situ ceramic is generally at least one and one-half times that of the starting preforms.« less

Inventors:
;
Publication Date:
Research Org.:
U.S. Dept. of Energy, Washington, D.C. (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176191
Patent Number(s):
7,488,537
Application Number:
10/931,671
Assignee:
Radtke, Robert P., Kingwood, TX (United States)
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.
Radtke, Robert P., & Sherman, Andrew. Ceramic impregnated superabrasives. United States.
Radtke, Robert P., and Sherman, Andrew. Tue . "Ceramic impregnated superabrasives". United States. https://www.osti.gov/servlets/purl/1176191.
@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}
}

Patent:

Save / Share:

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
  • DOI: 10.1002/app.1424