Al-Cr-Fe quasicrystals as novel reinforcements in Ti based composites consolidated using high pressure spark plasma sintering

R. T. Li; Z. L. Dong; K. A. Khor

doi:10.1016/j.matdes.2016.04.040

Al-Cr-Fe quasicrystals as novel reinforcements in Ti based composites consolidated using high pressure spark plasma sintering

R. T. Li, Z. L. Dong^*, K. A. Khor

^*Corresponding author for this work

Nanyang Technological University

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

32 Citations (Scopus)

Abstract

Ti based metal matrix composites (MMCs) reinforced with Al-Cr-Fe quasicrystals have been prepared using high pressure spark plasma sintering (HP-SPS) with a high heating/cooling rate of 200 °C/min between 550 °C and 750 °C and without any isothermal process. As the sintering pressure increases, the compositional variation of Al-Cr-Fe reinforcements diminishes. It is found that under a sintering pressure of 250 MPa, the phases in Al-Cr-Fe powders, including two quasicrystals, decagonal Al-Cr-Fe and icosahedral Al-Cr-Fe, and two of their approximants, Al₉(Cr,Fe)₄ and Al₈(Cr,Fe)₅, can be preserved. An interfacial layer forms between Ti matrix and Al-Cr-Fe reinforcements in the sintering process. This interfacial layer consists of Al₃Ti and AlTi. The incorporation of 20 wt.% Al-Cr-Fe particles into Ti matrix was found to improve the microhardness to Hv 480 and reduce the wear rate by around 70%. This implies that Al-Cr-Fe is a promising reinforcement candidate for Ti.

Original language	English
Pages (from-to)	255-263
Number of pages	9
Journal	Materials and Design
Volume	102
DOIs	https://doi.org/10.1016/j.matdes.2016.04.040
Publication status	Published - Jul 15 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016.

ASJC Scopus Subject Areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Keywords

Interfacial layer
Metal matrix composites
Microhardness
Quasicrystal
Wear mechanism

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10.1016/j.matdes.2016.04.040

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title = "Al-Cr-Fe quasicrystals as novel reinforcements in Ti based composites consolidated using high pressure spark plasma sintering",

abstract = "Ti based metal matrix composites (MMCs) reinforced with Al-Cr-Fe quasicrystals have been prepared using high pressure spark plasma sintering (HP-SPS) with a high heating/cooling rate of 200 °C/min between 550 °C and 750 °C and without any isothermal process. As the sintering pressure increases, the compositional variation of Al-Cr-Fe reinforcements diminishes. It is found that under a sintering pressure of 250 MPa, the phases in Al-Cr-Fe powders, including two quasicrystals, decagonal Al-Cr-Fe and icosahedral Al-Cr-Fe, and two of their approximants, Al9(Cr,Fe)4 and Al8(Cr,Fe)5, can be preserved. An interfacial layer forms between Ti matrix and Al-Cr-Fe reinforcements in the sintering process. This interfacial layer consists of Al3Ti and AlTi. The incorporation of 20 wt.% Al-Cr-Fe particles into Ti matrix was found to improve the microhardness to Hv 480 and reduce the wear rate by around 70%. This implies that Al-Cr-Fe is a promising reinforcement candidate for Ti.",

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author = "Li, {R. T.} and Dong, {Z. L.} and Khor, {K. A.}",

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doi = "10.1016/j.matdes.2016.04.040",

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AU - Li, R. T.

AU - Dong, Z. L.

AU - Khor, K. A.

PY - 2016/7/15

Y1 - 2016/7/15

N2 - Ti based metal matrix composites (MMCs) reinforced with Al-Cr-Fe quasicrystals have been prepared using high pressure spark plasma sintering (HP-SPS) with a high heating/cooling rate of 200 °C/min between 550 °C and 750 °C and without any isothermal process. As the sintering pressure increases, the compositional variation of Al-Cr-Fe reinforcements diminishes. It is found that under a sintering pressure of 250 MPa, the phases in Al-Cr-Fe powders, including two quasicrystals, decagonal Al-Cr-Fe and icosahedral Al-Cr-Fe, and two of their approximants, Al9(Cr,Fe)4 and Al8(Cr,Fe)5, can be preserved. An interfacial layer forms between Ti matrix and Al-Cr-Fe reinforcements in the sintering process. This interfacial layer consists of Al3Ti and AlTi. The incorporation of 20 wt.% Al-Cr-Fe particles into Ti matrix was found to improve the microhardness to Hv 480 and reduce the wear rate by around 70%. This implies that Al-Cr-Fe is a promising reinforcement candidate for Ti.

AB - Ti based metal matrix composites (MMCs) reinforced with Al-Cr-Fe quasicrystals have been prepared using high pressure spark plasma sintering (HP-SPS) with a high heating/cooling rate of 200 °C/min between 550 °C and 750 °C and without any isothermal process. As the sintering pressure increases, the compositional variation of Al-Cr-Fe reinforcements diminishes. It is found that under a sintering pressure of 250 MPa, the phases in Al-Cr-Fe powders, including two quasicrystals, decagonal Al-Cr-Fe and icosahedral Al-Cr-Fe, and two of their approximants, Al9(Cr,Fe)4 and Al8(Cr,Fe)5, can be preserved. An interfacial layer forms between Ti matrix and Al-Cr-Fe reinforcements in the sintering process. This interfacial layer consists of Al3Ti and AlTi. The incorporation of 20 wt.% Al-Cr-Fe particles into Ti matrix was found to improve the microhardness to Hv 480 and reduce the wear rate by around 70%. This implies that Al-Cr-Fe is a promising reinforcement candidate for Ti.

KW - Interfacial layer

KW - Metal matrix composites

KW - Microhardness

KW - Quasicrystal

KW - Wear mechanism

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Al-Cr-Fe quasicrystals as novel reinforcements in Ti based composites consolidated using high pressure spark plasma sintering

Abstract

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ASJC Scopus Subject Areas

Keywords

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