Boron-carbide-aluminum and boron-carbide-reactive metal cermets
- Manteca, CA
- Seattle, WA
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.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4605440
- OSTI ID:
- 865948
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
boron-carbide-reactive
metal
cermets
hard
tough
lightweight
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phases
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including
steps
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reacting
starting
materials
microstructures
resulting
controllably
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temperatures
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atmospheres
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ceramic
homogeneously
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adhesive
forces
ceramic-metal
interfaces
maximized
initial
consolidation
step
achieve
dense
modulus
rupture
exceeding
110
ksi
fracture
toughness
12
sqroot
methods
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variety
structural
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reaction temperatures
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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
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