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Title: Combustion synthesis of boride and other composites

Abstract

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.

Inventors:
; ;
Issue Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
6293648
Patent Number(s):
-US-A7225413
Application Number:
ON: DE89011463
Assignee:
Dept. of Energy LLNL; EDB-89-071140
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 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

Citation Formats

Halverson, D.C., Lum, B.Y., and Munir, Z.A. Combustion synthesis of boride and other composites. United States: N. p., 1988. Web.
Halverson, D.C., Lum, B.Y., & Munir, Z.A. Combustion synthesis of boride and other composites. United States.
Halverson, D.C., Lum, B.Y., and Munir, Z.A. Thu . "Combustion synthesis of boride and other composites". United States.
@article{osti_6293648,
title = {Combustion synthesis of boride and other composites},
author = {Halverson, D.C. and Lum, B.Y. and Munir, Z.A.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {7}
}