Spark plasma sintering of TiAl–Ti3AlC2 composite

Maryam Akhlaghi; Seyed Ali Tayebifard; Esmaeil Salahi; Mehdi Shahedi Asl

doi:10.1016/j.ceramint.2018.08.272

Spark plasma sintering of TiAl–Ti₃AlC₂ composite

Maryam Akhlaghi, Seyed Ali Tayebifard^*, Esmaeil Salahi, Mehdi Shahedi Asl

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

85 Citations (Scopus)

Abstract

A TiAl–15 wt% Ti₃AlC₂ composite was fabricated by spark plasma sintering (SPS) method, using as-purchased Ti and Al powders as well as as-synthesized Ti₃AlC₂ MAX phase. Ti₃AlC₂ was synthesized via mechanically-activated self-propagating high-temperature synthesis of Ti, Al, and C powders in a tubular furnace. The mixture of Ti, Al and Ti₃AlC₂ was ball-milled and spark plasma sintered at 1000 °C for a dwell time of 15 min under an external pressure of 40 MPa in vacuum atmosphere. The microstructure and phase evolution as well as the mechanical properties of the as-sintered composite were studied. A relative density of ~ 95%, Vickers hardness of ~ 4.5 GPa, fracture toughness of 11.9 MPa m^1/2, and flexural strength of 336 MPa were obtained by such a low-temperature SPS route.

Original language	English
Pages (from-to)	21759-21764
Number of pages	6
Journal	Ceramics International
Volume	44
Issue number	17
DOIs	https://doi.org/10.1016/j.ceramint.2018.08.272
Publication status	Published - 1 Dec 2018
Externally published	Yes

Keywords

Composite
Mechanical properties
Microstructure
Spark plasma sintering
TiAlC
TiAl

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10.1016/j.ceramint.2018.08.272

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@article{230c06f505984e848a4e03c7cc37b1bb,

title = "Spark plasma sintering of TiAl–Ti3AlC2 composite",

abstract = "A TiAl–15 wt% Ti3AlC2 composite was fabricated by spark plasma sintering (SPS) method, using as-purchased Ti and Al powders as well as as-synthesized Ti3AlC2 MAX phase. Ti3AlC2 was synthesized via mechanically-activated self-propagating high-temperature synthesis of Ti, Al, and C powders in a tubular furnace. The mixture of Ti, Al and Ti3AlC2 was ball-milled and spark plasma sintered at 1000 °C for a dwell time of 15 min under an external pressure of 40 MPa in vacuum atmosphere. The microstructure and phase evolution as well as the mechanical properties of the as-sintered composite were studied. A relative density of ~ 95%, Vickers hardness of ~ 4.5 GPa, fracture toughness of 11.9 MPa m1/2, and flexural strength of 336 MPa were obtained by such a low-temperature SPS route.",

keywords = "Composite, Mechanical properties, Microstructure, Spark plasma sintering, TiAlC, TiAl",

author = "Maryam Akhlaghi and Tayebifard, {Seyed Ali} and Esmaeil Salahi and {Shahedi Asl}, Mehdi",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = dec,

day = "1",

doi = "10.1016/j.ceramint.2018.08.272",

language = "English",

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journal = "Ceramics International",

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TY - JOUR

T1 - Spark plasma sintering of TiAl–Ti3AlC2 composite

AU - Akhlaghi, Maryam

AU - Tayebifard, Seyed Ali

AU - Salahi, Esmaeil

AU - Shahedi Asl, Mehdi

PY - 2018/12/1

Y1 - 2018/12/1

N2 - A TiAl–15 wt% Ti3AlC2 composite was fabricated by spark plasma sintering (SPS) method, using as-purchased Ti and Al powders as well as as-synthesized Ti3AlC2 MAX phase. Ti3AlC2 was synthesized via mechanically-activated self-propagating high-temperature synthesis of Ti, Al, and C powders in a tubular furnace. The mixture of Ti, Al and Ti3AlC2 was ball-milled and spark plasma sintered at 1000 °C for a dwell time of 15 min under an external pressure of 40 MPa in vacuum atmosphere. The microstructure and phase evolution as well as the mechanical properties of the as-sintered composite were studied. A relative density of ~ 95%, Vickers hardness of ~ 4.5 GPa, fracture toughness of 11.9 MPa m1/2, and flexural strength of 336 MPa were obtained by such a low-temperature SPS route.

AB - A TiAl–15 wt% Ti3AlC2 composite was fabricated by spark plasma sintering (SPS) method, using as-purchased Ti and Al powders as well as as-synthesized Ti3AlC2 MAX phase. Ti3AlC2 was synthesized via mechanically-activated self-propagating high-temperature synthesis of Ti, Al, and C powders in a tubular furnace. The mixture of Ti, Al and Ti3AlC2 was ball-milled and spark plasma sintered at 1000 °C for a dwell time of 15 min under an external pressure of 40 MPa in vacuum atmosphere. The microstructure and phase evolution as well as the mechanical properties of the as-sintered composite were studied. A relative density of ~ 95%, Vickers hardness of ~ 4.5 GPa, fracture toughness of 11.9 MPa m1/2, and flexural strength of 336 MPa were obtained by such a low-temperature SPS route.

KW - Composite

KW - Mechanical properties

KW - Microstructure

KW - Spark plasma sintering

KW - TiAlC

KW - TiAl

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DO - 10.1016/j.ceramint.2018.08.272

M3 - Article

AN - SCOPUS:85054089040

SN - 0272-8842

VL - 44

SP - 21759

EP - 21764

JO - Ceramics International

JF - Ceramics International

IS - 17

ER -

Spark plasma sintering of TiAl–Ti₃AlC₂ composite

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