Ti-Al-Si alloys are prospective material for high-temperature applications. Due to low density, good mechanical properties, and oxidation resistance, these intermetallic alloys can be used in the aerospace and automobile industries. Ti-Al-Si alloys were prepared by powder metallurgy using reactive sintering, milling, and spark plasma sintering. One of the novel SPS techniques is high-pressure spark plasma sintering (HP SPS), which was tested in this work and applied to a Ti-10Al-20Si intermetallic alloy using a pressure of 6 GPa and temperatures ranging from 1318 K (1045 °C) to 1597 K (1324 °C). The low-porosity consolidated samples consist of Ti₅Si₃ silicides in an aluminide (TiAl) matrix. The hardness varied between 720 and 892 HV 5.

Department of Metals and Corrosion Engineering University of Chemistry and Technology Prague Technická 5 16628 Prague Czech Republic

DIISM Università Politecnica delle Marche Via Brecce Bianche 60131 Ancona Italy

The Institute of Advanced Manufacturing Technology Wroclawska 37A 30 011 Krakow Poland

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Development of TiAl-Si Alloys-A Review

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Reactive Sintering Mechanism and Phase Formation in Ni-Ti-Al Powder Mixture During Heating