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Title: Boron-carbide-aluminum and boron-carbide-reactive metal cermets

Abstract

Hard, tough, lightweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidation step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modulus of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi.sqroot.in. These composites and methods can be used to form a variety of structural elements.

Inventors:
 [1];  [2];  [2]
  1. Manteca, CA
  2. Seattle, WA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865948
Patent Number(s):
4605440
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
boron-carbide-aluminum; boron-carbide-reactive; metal; cermets; hard; tough; lightweight; composites; particularly; produced; compositions; plurality; phases; method; provided; including; steps; wetting; reacting; starting; materials; microstructures; resulting; controllably; selected; reaction; temperatures; times; atmospheres; parameters; controlling; process; ceramic; homogeneously; distributed; adhesive; forces; ceramic-metal; interfaces; maximized; initial; consolidation; step; achieve; dense; modulus; rupture; exceeding; 110; ksi; fracture; toughness; 12; sqroot; methods; form; variety; structural; elements; reaction temperatures; metal composites; resulting composite; metal phases; active metal; starting material; fracture toughness; reaction temperature; starting materials; reactive metal; metal composite; resulting composites; reaction time; structural elements; metal phase; consolidation step; ceramic phase; metal cermet; metal cermets; resulting compositions; structural element; ceramic phases; controllably selected; homogeneously distributed; metal interface; resulting composition; weight boron; boron-carbide-reactive metal; /75/419/423/501/

Citation Formats

Halverson, Danny C, Pyzik, Aleksander J, and Aksay, Ilhan A. Boron-carbide-aluminum and boron-carbide-reactive metal cermets. United States: N. p., 1986. Web.
Halverson, Danny C, Pyzik, Aleksander J, & Aksay, Ilhan A. Boron-carbide-aluminum and boron-carbide-reactive metal cermets. United States.
Halverson, Danny C, Pyzik, Aleksander J, and Aksay, Ilhan A. Wed . "Boron-carbide-aluminum and boron-carbide-reactive metal cermets". United States. https://www.osti.gov/servlets/purl/865948.
@article{osti_865948,
title = {Boron-carbide-aluminum and boron-carbide-reactive metal cermets},
author = {Halverson, Danny C and Pyzik, Aleksander J and Aksay, Ilhan A},
abstractNote = {Hard, tough, lightweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidation step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modulus of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi.sqroot.in. These composites and methods can be used to form a variety of structural elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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