Reaction synthesis, or combustion synthesis is a production technique in which the thermal activation energy required for the formation of a compound is sustained by exothermic reaction heat released in the reaction. Ti-Al alloys are promising materials for aircraft industry, and they could be produced by self-propagating high-temperature combustion synthesis. The purpose of the present study was to research the effect of high initial compacting pressures (420 MPa, 630 MPa and 850 MPa) on the porosity of Ti3Al which produced by volume combustion synthesis. Microstructure examinations were carried out with optical microscope (OM) and scanning electron microscope (SEM). For phase analyses, X-ray diffraction device(XRD) was used. A considerable decrease in porosity was obtained because of the increase in the initial compacting pressure.

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