High-Pressure Spark Plasma Sintering (HP SPS): A Promising and Reliable Method for Preparing Ti–Al–Si Alloys
Anna Knaislová
1
Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic
2
The Institute of Advanced Manufacturing Technology, Wroclawska 37A, 30-011 Krakow, Poland
3
DIISM/Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Steven L Suib
Materials 2017, 10(5), 465; https://doi.org/10.3390/ma10050465
Received: 23 March 2017 / Revised: 24 April 2017 / Accepted: 25 April 2017 / Published: 27 April 2017
(This article belongs to the Section Manufacturing Processes and Systems)
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.
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Keywords:
high-pressure spark plasma sintering (HP SPS); powder metallurgy (PM); intermetallics; hardness
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MDPI and ACS Style
Knaislová, A.; Novák, P.; Cygan, S.; Jaworska, L.; Cabibbo, M. High-Pressure Spark Plasma Sintering (HP SPS): A Promising and Reliable Method for Preparing Ti–Al–Si Alloys. Materials 2017, 10, 465.
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