Formation of Mg-Mg2Cu nanostructured eutectic in Mg-based metal matrix composite

N. G. Ma; C. J. Deng; P. Yu; W. Y. Kwok; M. Aravind; D. H.L. Ng; S. L.I. Chan

doi:10.1557/JMR.2003.0269

Formation of Mg-Mg₂Cu nanostructured eutectic in Mg-based metal matrix composite

N. G. Ma, C. J. Deng, P. Yu, W. Y. Kwok, M. Aravind, D. H.L. Ng, S. L.I. Chan

Department of Chemical and Materials Engineering

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

18 Scopus citations

Abstract

We report the fabrication and characterization of a Mg-based metal matrix composite reinforced by MgO ceramic and Mg-Mg₂Cu eutectic. The composite was fabricated by sintering and quenching of a Mg-20 wt.% CuO sample. We performed differential scanning calorimetry (DSC) on the sample and found that the reaction between Mg and CuO took place at about 420°C. When the sample was sintered to 550°C and cooled down, the two-phase Mg-Mg₂ Cu eutectic formed. The final composite product contained MgO particles and Mg-Mg₂Cu eutectic, which were embedded in the Mg matrix. Based on the results from DSC and scanning and transmission electron microscopies, a model is proposed to describe the competitive growth of Mg and the eutectic during solidification. We also found that the microstructure of the Mg-Mg₂Cu eutectic strongly depended on the rate of cooling. The lamellar thickness of the eutectic could be reduced to 120 nm by oil-quenching the sintered sample.

Original language	English
Pages (from-to)	1934-1942
Number of pages	9
Journal	Journal of Materials Research
Volume	18
Issue number	8
DOIs	https://doi.org/10.1557/JMR.2003.0269
State	Published - Aug 2003

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title = "Formation of Mg-Mg2Cu nanostructured eutectic in Mg-based metal matrix composite",

abstract = "We report the fabrication and characterization of a Mg-based metal matrix composite reinforced by MgO ceramic and Mg-Mg2Cu eutectic. The composite was fabricated by sintering and quenching of a Mg-20 wt.% CuO sample. We performed differential scanning calorimetry (DSC) on the sample and found that the reaction between Mg and CuO took place at about 420°C. When the sample was sintered to 550°C and cooled down, the two-phase Mg-Mg2 Cu eutectic formed. The final composite product contained MgO particles and Mg-Mg2Cu eutectic, which were embedded in the Mg matrix. Based on the results from DSC and scanning and transmission electron microscopies, a model is proposed to describe the competitive growth of Mg and the eutectic during solidification. We also found that the microstructure of the Mg-Mg2Cu eutectic strongly depended on the rate of cooling. The lamellar thickness of the eutectic could be reduced to 120 nm by oil-quenching the sintered sample.",

author = "Ma, {N. G.} and Deng, {C. J.} and P. Yu and Kwok, {W. Y.} and M. Aravind and Ng, {D. H.L.} and Chan, {S. L.I.}",

note = "Funding Information: This work was supported by a Direct Allocation Grant from The Chinese University of Hong Kong (Project Code 2060195) and by the Research Grant Council (RGC) 2001 Earmarked Research Grant (Project Code 2150303).",

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T1 - Formation of Mg-Mg2Cu nanostructured eutectic in Mg-based metal matrix composite

AU - Ma, N. G.

AU - Deng, C. J.

AU - Yu, P.

AU - Kwok, W. Y.

AU - Aravind, M.

AU - Ng, D. H.L.

AU - Chan, S. L.I.

N1 - Funding Information: This work was supported by a Direct Allocation Grant from The Chinese University of Hong Kong (Project Code 2060195) and by the Research Grant Council (RGC) 2001 Earmarked Research Grant (Project Code 2150303).

PY - 2003/8

Y1 - 2003/8

N2 - We report the fabrication and characterization of a Mg-based metal matrix composite reinforced by MgO ceramic and Mg-Mg2Cu eutectic. The composite was fabricated by sintering and quenching of a Mg-20 wt.% CuO sample. We performed differential scanning calorimetry (DSC) on the sample and found that the reaction between Mg and CuO took place at about 420°C. When the sample was sintered to 550°C and cooled down, the two-phase Mg-Mg2 Cu eutectic formed. The final composite product contained MgO particles and Mg-Mg2Cu eutectic, which were embedded in the Mg matrix. Based on the results from DSC and scanning and transmission electron microscopies, a model is proposed to describe the competitive growth of Mg and the eutectic during solidification. We also found that the microstructure of the Mg-Mg2Cu eutectic strongly depended on the rate of cooling. The lamellar thickness of the eutectic could be reduced to 120 nm by oil-quenching the sintered sample.

AB - We report the fabrication and characterization of a Mg-based metal matrix composite reinforced by MgO ceramic and Mg-Mg2Cu eutectic. The composite was fabricated by sintering and quenching of a Mg-20 wt.% CuO sample. We performed differential scanning calorimetry (DSC) on the sample and found that the reaction between Mg and CuO took place at about 420°C. When the sample was sintered to 550°C and cooled down, the two-phase Mg-Mg2 Cu eutectic formed. The final composite product contained MgO particles and Mg-Mg2Cu eutectic, which were embedded in the Mg matrix. Based on the results from DSC and scanning and transmission electron microscopies, a model is proposed to describe the competitive growth of Mg and the eutectic during solidification. We also found that the microstructure of the Mg-Mg2Cu eutectic strongly depended on the rate of cooling. The lamellar thickness of the eutectic could be reduced to 120 nm by oil-quenching the sintered sample.

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DO - 10.1557/JMR.2003.0269

M3 - 期刊論文

AN - SCOPUS:0141742527

SN - 0884-2914

VL - 18

SP - 1934

EP - 1942

JO - Journal of Materials Research

JF - Journal of Materials Research

IS - 8

ER -

Formation of Mg-Mg2Cu nanostructured eutectic in Mg-based metal matrix composite

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Formation of Mg-Mg₂Cu nanostructured eutectic in Mg-based metal matrix composite