Synthesis of Ti-TiAl3 Composite by Resistive Sintering

Year 2017, Volume: 3 Issue: 2, 41 - 43, 01.11.2017

Tuba Yener

Abstract

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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