Self-Propagating High-Temperature Synthesis, Phase Stability and Properties of the Heusler Cu2TiAl Alloy

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Abstract

The Heusler intermetallic alloy Cu2TiAl was obtained via self-propagating high-temperature synthesis (SHS). The Cu2TiAl phase content in the combustion products of the Cu–Ti–Al system reached 96.2 wt.%. The microstructure and properties of the synthesized alloy were investigated. High-temperature X-ray diffraction analysis (XRD) demonstrated the phase stability of the alloy during stepwise heating and revealed that the anomalous behavior of the temperature-dependent electrical resistivity curve in the range of T = 770–790 K is not associated with phase transformations. A change in the sign of the Seebeck coefficient from negative to positive was observed upon heating at ~ 470 K.

About the authors

M. L Busurina

Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science of the Russian Academy of Sciences

Email: busurina@ism.ac.ru
Chernogolovka, Russian Federation

A. V Karpov

Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science of the Russian Academy of Sciences

Chernogolovka, Russian Federation

D. Y Kovalev

Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science of the Russian Academy of Sciences

Chernogolovka, Russian Federation

A. E Sytschev

Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science of the Russian Academy of Sciences

Chernogolovka, Russian Federation

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