Synthesis of Ti-TiAl3 Composite by Resistive Sintering

In the present work, Ti-TiAl3 metallic-intermetallic in situ composites were synthesized by one step resistive sintering method. Process time had been completed in 90 second using 1.5-1.7 Volt and 2000 Amper direct current. Ti and Al elemental powders were mixed by the stoichiometric ratio corresponding to the TiAl3 intermetallic phases' with molar proportion of 1:3. We aimed to obtain some residual ductile Ti phase as well as the TiAl3 major phase in structure. XRD analyses detected the only phases in the composite were Ti and TiAl3. TiAl2 phase also detected as trace peak in the XRD Chart. SEM examinations showed a dense microstructure with low amount of porosity. The relative density of the sample measured according to Archimedes’ principle was 98,7%, and the microhardness of the sample was about 455±20 HV.

Keywords:

Synthesis of Ti-TiAl3 Composite by Resistive Sintering Ti-Al intermetallics,

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