Combustion synthesis of boride and other composites
A self-sustaining combustion synthesis process for producing hard, tough, lightweight B/sub 4/C/TiB/sub 2/ composites is described. It 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. 9 figs., 4 tabs.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7225413
- Application Number:
- ON: DE89011463
- OSTI ID:
- 6293648
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Combustion synthesis of boride and other composites
The combustion synthesis of boride composites. [B/sub 4/C/TiB/sub 2/ infiltrated with Al]
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BORON CARBIDES
SYNTHESIS
TITANIUM BORIDES
ADIABATIC PROCESSES
COMBUSTION
COMPOSITE MATERIALS
INVENTIONS
KINETICS
MICROSTRUCTURE
TEMPERATURE DEPENDENCE
THERMODYNAMICS
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
MATERIALS
OXIDATION
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies