Research article
Role of SPS temperature and holding time on the properties of Ti3AlC2-doped TiAl composites
- 1 Semiconductors Department, Materials and Energy Research Center (MERC), Karaj, Iran
- 2 Ceramics Department, Materials and Energy Research Center (MERC), Karaj, Iran
- 3 Faculty of Mechanical, Process and Energy Engineering, TU Bergakademie, Freiberg, Germany
Abstract
In order to study the effects of sintering conditions on the properties of TiAl-based materials, two different compositions (TiAl-15 wt% Ti3AlC2 and TiAl-25 wt% Ti3AlC2) were chosen and manufactured by spark plasma sintering at 900 °C/7 min and 1000 °C/15 min. The results showed that increasing the MAX phase content had a positive effect on the relative density and mechanical properties, but simultaneous increasing the temperature and holding time is more effective in the improvement of properties. For TiAl-15 wt% Ti3AlC2 sample, the relative density, Vickers hardness, fracture toughness, and bending strength increased from 92.3%, 3.6 GPa, 10.9 MPa.m1/2, and 206 MPa to 95.2%, 4.5 GPa, 12.0 MPa.m1/2, and 336 MPa, respectively, as the sintering temperature and holding time increased from 900 °C/7 min to 1000 °C/15 min. In the case of the TiAl-25 wt% Ti3AlC2 sample, increasing the sintering temperature and holding time from 900 °C/7 min to 1000 °C/15 min led to the improvement of relative density, Vickers hardness, fracture toughness, and bending strength from 92.8%, 4.1 GPa, 11.2 MPa.m1/2, and 270 MPa to 97.5%, 4.6 GPa, 11.8 MPa.m1/2, and 340 MPa, respectively.
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Keywords:
TiAl-Ti3AlC2 composites, Relative density, Flexural strength, Hardness, Fracture toughness
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Cited By
Submitted
2021-12-26
Available online
2022-09-30
How to Cite
Akhlaghi, M., Salahi, E., Tayebifard, S. A., & Schmidt, G. (2022). Role of SPS temperature and holding time on the properties of Ti3AlC2-doped TiAl composites. Synthesis and Sintering, 2(3), 138-145. https://doi.org/10.53063/synsint.2022.2383
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Copyright (c) 2022 Maryam Akhlaghi, Esmaeil Salahi, Seyed Ali Tayebifard, Gert Schmidt
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