Combustion synthesis of boride and other composites

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:867166

Halverson, Danny C ^[1]; Lum, Beverly Y ^[2]; Munir, Zuhair A ^[3]

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1. Modesto, CA
2. Livermore, CA
3. Davis, CA

A self-sustaining combustion synthesis process for producing hard, tough, lightweight B.sub.4 C/TiB.sub.2 composites is based on the thermodynamic dependence of adiabatic temperature and product composition on the stoichiometry of the B.sub.4 C and TiB.sub.2 reactants. For lightweight products the composition must be relatively rich in the B.sub.4 C component. B.sub.4 C-rich composites are obtained by varying the initial temperature of the reactants. The product is hard, porous material whose toughness can be enhanced by filling the pores with aluminum or other metal phases using a liquid metal infiltration process. The process can be extended to the formation of other composites having a low exothermic component.

• 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 4879262
• OSTI ID: 867166
• Country of Publication: United States
• Language: English

Related Subjects

combustion
synthesis
boride
composites
self-sustaining
process
producing
hard
tough
lightweight
tib
based
thermodynamic
dependence
adiabatic
temperature
product
composition
stoichiometry
reactants
products
relatively
rich
component
c-rich
obtained
varying
initial
porous
material
toughness
enhanced
filling
pores
aluminum
metal
phases
liquid
infiltration
extended
formation
exothermic
synthesis process
metal phases
combustion synthesis
porous material
liquid metal
relatively rich
adiabatic temperature
self-sustaining combustion
metal phase
metal infiltration
rich composites
exothermic component
weight products
initial temperature
infiltration process
thermodynamic dependence
producing hard
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