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Nanoscale Visualization of Phase Transition in Melting of Sn–Bi Particles by In situ Hard X-ray Ptychographic Coherent Diffraction Imaging
Published online by Cambridge University Press: 28 August 2020
Abstract
The phase transition in the melting of Sn–Bi eutectic solder alloy particles was observed by in situ hard X-ray ptychographic coherent diffraction imaging with a pin-point heating system. Ptychographic diffraction patterns of micrometer-sized Sn–Bi particles were collected at temperatures from room temperature to 540 K. The projection images of each particle were reconstructed at a spatial resolution of 25 nm, showing differences in the phase shifts due to two crystal phases in the Sn–Bi alloy system and the Sn/Bi oxides at the surface. By quantitatively evaluating the Bi content, it became clear that the nonuniformity of the composition of Sn and Bi at the single-particle level exists when the particles are synthesized by centrifugal atomization.
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- Materials Science Applications
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- Copyright © Microscopy Society of America 2020
Footnotes
Nozomu Ishiguro and Takaya Higashino contributed equally to this work.
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