Combustion synthesis of low exothermic component rich composites

Details Combustion synthesis of low exothermic component rich composites Combustion synthesis of low exothermic component rich composites

1989-09-01

1991-02-05

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75236, 75240, 75244, 419 27, 419 45, C22C 2902

Patent

active

049901800

ABSTRACT:
A self-sustaining combustion synthesis process for producing hard, tough, lightweight, low exothermic potential product (LEPP)/high exothermic potential product (HEPP) composites is based on the thermodynamic dependence of adiabatic temperature and product composition on the stoichiometry of the LEPP and HEPP reactants. For lightweight products the composition must be relatively rich in the LEPP component. LEPP 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.

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Crider, Joey F., "Self-Propagating High Temperature Synthesis--A Soviet Method for Producing Ceramic Materials", Ceramic Engineering & Science Proceedings, Sep.-Oct. 1982, vol. 3, pp. 519-528.

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