Microstructural evolution in spray-formed and melt-spun Al85Nd5Ni10 bulk hybrid composites

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

doi:10.1016/j.intermet.2006.01.041

Microstructural evolution in spray-formed and melt-spun Al₈₅Nd₅Ni₁₀ bulk hybrid composites

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

19 Scopus citations

Abstract

Microstructure evolutions in the spray-formed and melt-spun Al₈₅Nd₅Ni₁₀ alloys were studied. The spray forming process has shown to be capable of directly producing a bulk scale Al₈₅Nd₅Ni₁₀ hybrid composite consisting of amorphous and nanostructured phases without the need of using an amorphous precursor. The spray-formed overspray flakes were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed deposit was completely crystallized due to the devitrification of the retained amorphous phase to nanoscale secondary crystals upon deposition. In the deposit and flake, the primary crystals were micro-scaled Al₆NdNi₂, and the secondary crystals devitrified from the amorphous phase during spray forming process were nanoscaled Al₃Ni and Al₆NdNi₂, dispersed in nanoscaled α-Al matrix. The completely devitrified melt-spun ribbon composite consisted of secondary crystals Al₃Ni, Al₁₁Nd₃ and Al₆NdNi₂ with nanoscale sizes, dispersed in the nanoscaled α-Al matrix. Deformation twins were observed in the primary Al₆NdNi₂ crystal in the as-spray-formed flake and deposit, but were not found in the secondary Al₆NdNi₂ crystals in the completely devitrified ribbon.

Original language	English
Pages (from-to)	1069-1074
Number of pages	6
Journal	Intermetallics
Volume	14
Issue number	8-9
DOIs	https://doi.org/10.1016/j.intermet.2006.01.041
State	Published - Aug 2006

Keywords

A. Composites
A. Nanostructured intermetallics
B. Twinning
C. Rapid solidification processing
F. Electron microscopy, transmission

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10.1016/j.intermet.2006.01.041

Cite this

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title = "Microstructural evolution in spray-formed and melt-spun Al85Nd5Ni10 bulk hybrid composites",

abstract = "Microstructure evolutions in the spray-formed and melt-spun Al85Nd5Ni10 alloys were studied. The spray forming process has shown to be capable of directly producing a bulk scale Al85Nd5Ni10 hybrid composite consisting of amorphous and nanostructured phases without the need of using an amorphous precursor. The spray-formed overspray flakes were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed deposit was completely crystallized due to the devitrification of the retained amorphous phase to nanoscale secondary crystals upon deposition. In the deposit and flake, the primary crystals were micro-scaled Al6NdNi2, and the secondary crystals devitrified from the amorphous phase during spray forming process were nanoscaled Al3Ni and Al6NdNi2, dispersed in nanoscaled α-Al matrix. The completely devitrified melt-spun ribbon composite consisted of secondary crystals Al3Ni, Al11Nd3 and Al6NdNi2 with nanoscale sizes, dispersed in the nanoscaled α-Al matrix. Deformation twins were observed in the primary Al6NdNi2 crystal in the as-spray-formed flake and deposit, but were not found in the secondary Al6NdNi2 crystals in the completely devitrified ribbon.",

keywords = "A. Composites, A. Nanostructured intermetallics, B. Twinning, C. Rapid solidification processing, F. Electron microscopy, transmission",

author = "Guo, {M. L.Ted} 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 University and I-Shou University, the DSC analyzer in China Steel Corporation, and JEOL 3010 TEM in National Sun-Yat-Sen University, are greatly acknowledged. ",

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T1 - Microstructural evolution in spray-formed and melt-spun Al85Nd5Ni10 bulk hybrid composites

AU - Guo, M. L.Ted

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 University and I-Shou University, the DSC analyzer in China Steel Corporation, and JEOL 3010 TEM in National Sun-Yat-Sen University, are greatly acknowledged.

PY - 2006/8

Y1 - 2006/8

N2 - Microstructure evolutions in the spray-formed and melt-spun Al85Nd5Ni10 alloys were studied. The spray forming process has shown to be capable of directly producing a bulk scale Al85Nd5Ni10 hybrid composite consisting of amorphous and nanostructured phases without the need of using an amorphous precursor. The spray-formed overspray flakes were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed deposit was completely crystallized due to the devitrification of the retained amorphous phase to nanoscale secondary crystals upon deposition. In the deposit and flake, the primary crystals were micro-scaled Al6NdNi2, and the secondary crystals devitrified from the amorphous phase during spray forming process were nanoscaled Al3Ni and Al6NdNi2, dispersed in nanoscaled α-Al matrix. The completely devitrified melt-spun ribbon composite consisted of secondary crystals Al3Ni, Al11Nd3 and Al6NdNi2 with nanoscale sizes, dispersed in the nanoscaled α-Al matrix. Deformation twins were observed in the primary Al6NdNi2 crystal in the as-spray-formed flake and deposit, but were not found in the secondary Al6NdNi2 crystals in the completely devitrified ribbon.

AB - Microstructure evolutions in the spray-formed and melt-spun Al85Nd5Ni10 alloys were studied. The spray forming process has shown to be capable of directly producing a bulk scale Al85Nd5Ni10 hybrid composite consisting of amorphous and nanostructured phases without the need of using an amorphous precursor. The spray-formed overspray flakes were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed deposit was completely crystallized due to the devitrification of the retained amorphous phase to nanoscale secondary crystals upon deposition. In the deposit and flake, the primary crystals were micro-scaled Al6NdNi2, and the secondary crystals devitrified from the amorphous phase during spray forming process were nanoscaled Al3Ni and Al6NdNi2, dispersed in nanoscaled α-Al matrix. The completely devitrified melt-spun ribbon composite consisted of secondary crystals Al3Ni, Al11Nd3 and Al6NdNi2 with nanoscale sizes, dispersed in the nanoscaled α-Al matrix. Deformation twins were observed in the primary Al6NdNi2 crystal in the as-spray-formed flake and deposit, but were not found in the secondary Al6NdNi2 crystals in the completely devitrified ribbon.

KW - A. Composites

KW - A. Nanostructured intermetallics

KW - B. Twinning

KW - C. Rapid solidification processing

KW - F. Electron microscopy, transmission

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