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Title: Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets

Abstract

A chemical pretreatment method is used to produce boron carbide-, boron-, and boride-reactive metal composites by an infiltration process. The boron carbide or other starting constituents, in powder form, are immersed in various alcohols, or other chemical agents, to change the surface chemistry of the starting constituents. The chemically treated starting constituents are consolidated into a porous ceramic precursor which is then infiltrated by molten aluminum or other metal by heating to wetting conditions. Chemical treatment of the starting constituents allows infiltration to full density. The infiltrated precursor is further heat treated to produce a tailorable microstructure. The process at low cost produces composites with improved characteristics, including increased toughness, strength.

Inventors:
 [1];  [2]
  1. (Manteca, CA)
  2. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
866470
Patent Number(s):
4718941
Assignee:
Regents of University of California (Berkeley, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
infiltration; processing; boron; carbide-; boron-; boride-reactive; metal; cermets; chemical; pretreatment; method; produce; composites; process; carbide; starting; constituents; powder; form; immersed; various; alcohols; agents; change; surface; chemistry; chemically; treated; consolidated; porous; ceramic; precursor; infiltrated; molten; aluminum; heating; wetting; conditions; treatment; allows; density; heat; tailorable; microstructure; cost; produces; improved; characteristics; including; increased; toughness; strength; metal composites; treatment method; improved characteristics; chemical agent; chemical agents; active metal; boron carbide; heat treated; reactive metal; porous ceramic; ceramic precursor; powder form; metal composite; molten aluminum; chemical treatment; metal cermet; metal cermets; infiltration process; surface chemistry; increased toughness; boride-reactive metal; boron carbide-; /75/419/

Citation Formats

Halverson, Danny C., and Landingham, Richard L. Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets. United States: N. p., 1988. Web.
Halverson, Danny C., & Landingham, Richard L. Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets. United States.
Halverson, Danny C., and Landingham, Richard L. Fri . "Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets". United States. https://www.osti.gov/servlets/purl/866470.
@article{osti_866470,
title = {Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets},
author = {Halverson, Danny C. and Landingham, Richard L.},
abstractNote = {A chemical pretreatment method is used to produce boron carbide-, boron-, and boride-reactive metal composites by an infiltration process. The boron carbide or other starting constituents, in powder form, are immersed in various alcohols, or other chemical agents, to change the surface chemistry of the starting constituents. The chemically treated starting constituents are consolidated into a porous ceramic precursor which is then infiltrated by molten aluminum or other metal by heating to wetting conditions. Chemical treatment of the starting constituents allows infiltration to full density. The infiltrated precursor is further heat treated to produce a tailorable microstructure. The process at low cost produces composites with improved characteristics, including increased toughness, strength.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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