Behavior of Intermetallic Compounds of Al-Ti Composite Manufactured by Spark Plasma Sintering

In this research, we successfully fabricate high-hardness and lightweight Al-Ti composites. Al-Ti composites powders with three compositions (Al-20, 50, and 80 vol.% Ti) are mixed using ball milling and subsequently subjected to spark plasma sintering (SPS). The microstructures and phases of the Al-...

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Bibliographic Details
Published in:Materials 2019-01, Vol.12 (2), p.331
Main Authors: Park, Kwangjae, Kim, Dasom, Kim, Kyungju, Cho, Seungchan, Kwon, Hansang
Format: Article
Language:English
Subjects:
Aluminum
Ball milling
Carbon
Composite materials
Diamond pyramid hardness
Differential thermal analysis
Differential thermogravimetric analysis
Electron probe microanalysis
Electron probes
Emission analysis
Field emission spectroscopy
Gas turbine engines
Hardness
Heat resistance
Intermetallic compounds
Lightweight
Mechanical properties
Metallurgical analysis
Morphology
Particle size
Plasma sintering
Powder metallurgy
Process controls
Raw materials
Scanning electron microscopy
Spark plasma sintering
Titanium
Titanium alloys
Weight reduction
X-ray diffraction
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Summary:In this research, we successfully fabricate high-hardness and lightweight Al-Ti composites. Al-Ti composites powders with three compositions (Al-20, 50, and 80 vol.% Ti) are mixed using ball milling and subsequently subjected to spark plasma sintering (SPS). The microstructures and phases of the Al-Ti composites are characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) spectroscopy, and field emission-electron probe microanalysis (FE-EPMA). These tests confirm the presence of several intermetallic compounds (ICs) (Al₃Ti, Al₅Ti₂, Al Ti₅) in the composites, and we are able to confirm that these ICs are produced by the reaction of Al and Ti during the SPS process. Furthermore, thermogravimetric-differential thermal analysis (TG-DTA) is used to analyze the formation behavior of the ICs. In addition, the mechanical properties of the composites are measured using their Vickers hardness and it is observed that the Al-80 vol.% Ti composite exhibits the highest hardness. Consequently, it is assumed that SPS is suitable for fabricating Al-Ti composites which represent the next-generation materials to be used in various industrial fields as high-hardness and lightweight materials.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12020331