Crystallization behavior of spray-formed and melt-spun Al89 La6Ni5 hybrid composites with amorphous and nanostructured phases

M. L. Ted Guo; Chi Y.A. Tsao; J. C. Huang; J. S.C. Jang

doi:10.1016/j.msea.2005.05.088

Crystallization behavior of spray-formed and melt-spun Al₈₉ La₆Ni₅ hybrid composites with amorphous and nanostructured phases

M. L. Ted Guo, Chi Y.A. Tsao, J. C. Huang, J. S.C. Jang

Graduate Institute of Materials Science and Engineering

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

15 Scopus citations

Abstract

The crystallization behavior of spray-formed and melt-spun Al₈₉La₆Ni₅ alloys was studied. Spray forming process could produce a bulk scale Al₈₉La₆ Ni₅ hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The fraction of amorphous phase in the spray-formed composite was determined to be 36% by DSC, which came mostly from supercooled liquid droplets upon spray forming. Amorphous phase partially devitrified to nano-scale fcc-Al secondary crystals during deposition. Two significant primary crystals observed in the spray-formed bulk hybrid composite are Al₃Ni and Al₁₁La₃ (Ni), but their size is reduced to about 1 μm. Contrary to the microstructure of spray-formed deposit, the heat-treated and fully devitrified melt-spun ribbon hybrid composite consists of nano-scale fcc-Al, Al₃Ni, Al₁₁La₃ as well as some metastable Al₆Ni and Al₄LaNi phases with sizes of about 200 nm. Deformation twins were found in the Al₁₁ La₃(Ni) crystals in spray-formed deposit, but not in the fully devitrified ribbon. Finally, the microstructure structure evolution of spray-formed deposit and heat-treated ribbon are studied and proposed.

Original language	English
Pages (from-to)	49-56
Number of pages	8
Journal	Materials Science and Engineering A
Volume	404
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2005.05.088
State	Published - 15 Sep 2005

Keywords

Bulk amorphous
Crystallization
Hybrid nanocomposites
Melt spinning
Spray forming

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10.1016/j.msea.2005.05.088

Cite this

@article{91b686a1ffb14e078fa5cfc6d214f786,

title = "Crystallization behavior of spray-formed and melt-spun Al89 La6Ni5 hybrid composites with amorphous and nanostructured phases",

abstract = "The crystallization behavior of spray-formed and melt-spun Al89La6Ni5 alloys was studied. Spray forming process could produce a bulk scale Al89La6 Ni5 hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The fraction of amorphous phase in the spray-formed composite was determined to be 36% by DSC, which came mostly from supercooled liquid droplets upon spray forming. Amorphous phase partially devitrified to nano-scale fcc-Al secondary crystals during deposition. Two significant primary crystals observed in the spray-formed bulk hybrid composite are Al3Ni and Al11La3 (Ni), but their size is reduced to about 1 μm. Contrary to the microstructure of spray-formed deposit, the heat-treated and fully devitrified melt-spun ribbon hybrid composite consists of nano-scale fcc-Al, Al3Ni, Al11La3 as well as some metastable Al6Ni and Al4LaNi phases with sizes of about 200 nm. Deformation twins were found in the Al11 La3(Ni) crystals in spray-formed deposit, but not in the fully devitrified ribbon. Finally, the microstructure structure evolution of spray-formed deposit and heat-treated ribbon are studied and proposed.",

keywords = "Bulk amorphous, Crystallization, Hybrid nanocomposites, Melt spinning, Spray forming",

author = "{Ted Guo}, {M. L.} and Tsao, {Chi Y.A.} and Huang, {J. C.} and Jang, {J. S.C.}",

note = "Funding Information: The financial support from the National Science Council and the technical supports of the melt-spun facilities in National Chung Cheng and I-Shou University, the DSC analyzer in China Steel Corporation, and JEOL 3010 TEM in National Sun-Yat-Sen University are kindly acknowledged.",

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T1 - Crystallization behavior of spray-formed and melt-spun Al89 La6Ni5 hybrid composites with amorphous and nanostructured phases

AU - Ted Guo, M. L.

AU - Tsao, Chi Y.A.

AU - Huang, J. C.

AU - Jang, J. S.C.

N1 - Funding Information: The financial support from the National Science Council and the technical supports of the melt-spun facilities in National Chung Cheng and I-Shou University, the DSC analyzer in China Steel Corporation, and JEOL 3010 TEM in National Sun-Yat-Sen University are kindly acknowledged.

PY - 2005/9/15

Y1 - 2005/9/15

N2 - The crystallization behavior of spray-formed and melt-spun Al89La6Ni5 alloys was studied. Spray forming process could produce a bulk scale Al89La6 Ni5 hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The fraction of amorphous phase in the spray-formed composite was determined to be 36% by DSC, which came mostly from supercooled liquid droplets upon spray forming. Amorphous phase partially devitrified to nano-scale fcc-Al secondary crystals during deposition. Two significant primary crystals observed in the spray-formed bulk hybrid composite are Al3Ni and Al11La3 (Ni), but their size is reduced to about 1 μm. Contrary to the microstructure of spray-formed deposit, the heat-treated and fully devitrified melt-spun ribbon hybrid composite consists of nano-scale fcc-Al, Al3Ni, Al11La3 as well as some metastable Al6Ni and Al4LaNi phases with sizes of about 200 nm. Deformation twins were found in the Al11 La3(Ni) crystals in spray-formed deposit, but not in the fully devitrified ribbon. Finally, the microstructure structure evolution of spray-formed deposit and heat-treated ribbon are studied and proposed.

AB - The crystallization behavior of spray-formed and melt-spun Al89La6Ni5 alloys was studied. Spray forming process could produce a bulk scale Al89La6 Ni5 hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The fraction of amorphous phase in the spray-formed composite was determined to be 36% by DSC, which came mostly from supercooled liquid droplets upon spray forming. Amorphous phase partially devitrified to nano-scale fcc-Al secondary crystals during deposition. Two significant primary crystals observed in the spray-formed bulk hybrid composite are Al3Ni and Al11La3 (Ni), but their size is reduced to about 1 μm. Contrary to the microstructure of spray-formed deposit, the heat-treated and fully devitrified melt-spun ribbon hybrid composite consists of nano-scale fcc-Al, Al3Ni, Al11La3 as well as some metastable Al6Ni and Al4LaNi phases with sizes of about 200 nm. Deformation twins were found in the Al11 La3(Ni) crystals in spray-formed deposit, but not in the fully devitrified ribbon. Finally, the microstructure structure evolution of spray-formed deposit and heat-treated ribbon are studied and proposed.

KW - Bulk amorphous

KW - Crystallization

KW - Hybrid nanocomposites

KW - Melt spinning

KW - Spray forming

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