High-Pressure Spark Plasma Sintering (HP SPS): A Promising and Reliable Method for Preparing Ti-Al-Si Alloys

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 s...

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Bibliographic Details
Published in:Materials 2017-04, Vol.10 (5), p.465
Main Authors: Knaislová, Anna, Novák, Pavel, Cygan, Sławomir, Jaworska, Lucyna, Cabibbo, Marcello
Format: Article
Language:English
Subjects:
Activated sintering
Aerospace industry
Aluminum base alloys
Densification
Hardness
Mechanical properties
Oxidation resistance
Plasma sintering
Porosity
Silicides
Spark plasma sintering
Titanium aluminides
Titanium base alloys
Titanium compounds
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Summary: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.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma10050465