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Formation of Intermetallic-Ceramic Composites from Nanoreactants in a Self-Sustaining Reaction Regime

Published online by Cambridge University Press:  01 February 2011

Shivanee R. Dargar ,
Lori J. Groven ,
Jacek J. Swiatkiewicz  and
Jan A. Puszynski
Shivanee R. Dargar
Affiliation:
Chemistry and Chemical Engineering Department, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD 57701, U.S.A
Lori J. Groven
Affiliation:
Chemistry and Chemical Engineering Department, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD 57701, U.S.A
Jacek J. Swiatkiewicz
Affiliation:
Chemistry and Chemical Engineering Department, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD 57701, U.S.A
Jan A. Puszynski
Affiliation:
Chemistry and Chemical Engineering Department, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD 57701, U.S.A
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Abstract

Processing of nanoreactant energetic system, Al-TiO2, in the thermal explosion mode of combustion synthesis was investigated. Simultaneous combustion synthesis and densification experiments were carried out in a uniaxial press to obtain homogeneous as well as functionally graded products of the above reactant system. It was demonstrated that TiAl3-Al2O3 composite product synthesized from Al-TiO2 reactant system retained its sub-microstructure despite a short term exposure to higher temperatures. Composite materials with densities of 96–98% of the theoretical densities were obtained. The effect of several key processing parameters such as initial composition of reactants and temperature-pressure conditions on morphology of combustion synthesized product, their phase composition, and residual porosity were investigated. DSC, XRD, SEM, and LIBS analyses were used to characterize both reactants and products.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 848: Symposium FF – Solid-State Chemistry of Inorganic Materials V , 2004 , FF1.7
Copyright
Copyright © Materials Research Society 2005

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References

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