In Situ Transmission Electron Microscopy Observations of Alloying of Nanoscale Pb Inclusions by Implantation with Cd Ions

Johnson, E.; Dahmen, U.

doi:10.1017/s1431927697970306

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…[1][2][3][4][5] Reasonable understanding exists on the morphological evolution of the nanodispersed second-phase particles in these systems. [8][9][10][11] It is of interest to understand the microstructural development, melting, and solidification kinetics of these alloyed nanoinclusions, and this paper reports the results of one such attempt. However, very limited literature exists on the study of embedded bimetallic inclusions synthesized through the rapid solidification of ternary monotectic alloys.…”

Section: Introductionmentioning

confidence: 99%

Morphology and thermal characteristics of nano-sized Pb–Sn inclusions in Al

Bhattacharya

Chattopadhyay

2002

J. Mater. Res.

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Nanoembedded aluminum alloys with bimetallic dispersoids of Sn and Pb of compositions Sn 82 -Pb 18 , Sn 64 -Pb 36 , and Sn 54 -Pb 46 were synthesized by rapid solidification. The two phases, face-centered-cubic Pb and tetragonal Sn solid-solution, coexist in all the particles. The crystallographic relation between the two phases and the matrix depends upon the solidification pathways adopted by the particles. For Al-(Sn 82 -Pb 18 ), we report a new orientation relation given by [011]Al//[010]Sn and (011)A1//(101)Sn. Pb exhibits a cube-on-cube orientation with Al in few particles, while in others no orientation relationship could be observed. In contrast, Pb in Sn 64 -Pb 36 and Sn 54 -Pb 46 particles always exhibits cube-on-cube orientation with the matrix. Sn does not show any orientation relationship with Al or Pb in these cases. Differential scanning calorimetry studies revealed melting at eutectic temperature for all compositions, although solidification pathways are different. Attempts were made to correlate these with the melting and heterogeneous nucleation characteristics.

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Section: Introductionmentioning

confidence: 99%

Morphology and thermal characteristics of nano-sized Pb–Sn inclusions in Al

Bhattacharya

Chattopadhyay

2002

J. Mater. Res.

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Melting and superheating of crystalline solids: From bulk to nanocrystals

Mei

2007

Progress in Materials Science

556

385

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Microstructure of off-Eutectic Nanoscale Pb-Cd Inclusions in Al

et al. 1999

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Much work has been devoted to TEM studies of nanoscale precipitates consisting of non-soluble elements in Al, as the Al matrix acts as a unique crucible enabling the study of melting/ solidification and crystal phase transformations at a nanometer scale. Recently, this work has been extended to include the ternary system of Al-Pb-Cd. This system is of particular interest, as both Pb and Cd display a large liquid miscibility gap with Al, but together they form a eutectic system. Bimetallic inclusions consist of an fcc Pb and an hcp Cd segment, joined along an internal interface parallel to the {111}Al planes. In this work, the microstructure and composition of off-eutectic Pb-Cd inclusions are studied. Polycrystalline Al samples were implanted with 1 x 1020 ions/m2 (∼3 at.%) with a Cd:Pb ratio of either 8:2 or 2:8, at temperatures to form inclusions in the 10 nm size range.

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In Situ Transmission Electron Microscopy Observations of Alloying of Nanoscale Pb Inclusions by Implantation with Cd Ions

Abstract: In Situ Transmission Electron Microscopy Observations of Alloying of Nanoscale Pb Inclusions by Implantation with Cd Ions

Cited by 6 publications

References 15 publications

Morphology and thermal characteristics of nano-sized Pb–Sn inclusions in Al

Morphology and thermal characteristics of nano-sized Pb–Sn inclusions in Al

Melting and superheating of crystalline solids: From bulk to nanocrystals

Microstructure of off-Eutectic Nanoscale Pb-Cd Inclusions in Al

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