Next Article in Journal
Introducing Obliquely Perforated Phononic Plates for Enhanced Bandgap Efficiency
Next Article in Special Issue
Dynamic Tomographic Reconstruction of Deforming Volumes
Previous Article in Journal
Pattern-Dependent Mammalian Cell (Vero) Morphology on Tantalum/Silicon Oxide 3D Nanocomposites
Previous Article in Special Issue
In-Situ X-ray Tomography Observation of Structure Evolution in 1,3,5-Triamino-2,4,6-Trinitrobenzene Based Polymer Bonded Explosive (TATB-PBX) under Thermo-Mechanical Loading
Open AccessArticle

Observation of Morphology Changes of Fine Eutectic Si Phase in Al-10%Si Cast Alloy during Heat Treatment by Synchrotron Radiation Nanotomography

1
Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan
2
Research & Utilization Division, Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
*
Author to whom correspondence should be addressed.
Materials 2018, 11(8), 1308; https://doi.org/10.3390/ma11081308
Received: 3 July 2018 / Revised: 23 July 2018 / Accepted: 25 July 2018 / Published: 28 July 2018
(This article belongs to the Special Issue In-Situ X-Ray Tomographic Study of Materials)
A series of three-dimensional morphology changes of fine eutectic Si-particles during heat treatment have been investigated in Self-modified and Sr-modified Al-10%Si cast alloys by means of synchrotron radiation nanotomography utilizing a Fresnel zone plate and a Zernike phase plate in this study. The coral-like shape particles observed in Sr-modified cast alloy fragmented at branch and neck during heat treatment at 773 K. The fragmentation occurred up to 900 s. After that, the fragmented particles grew and spheroidized by Ostwald ripening. On the other hand, rod-like shaped eutectic Si-particles observed in self-modified cast alloy were larger in size compared with the particle size in Sr-modified cast alloy. Separation of eutectic Si-particles in Self-modified cast alloy occurred up to approximately 900 s, which was similar tendency to that in Sr-modified cast alloy. However, it was found that the morphology change behavior was very complex in rod-like shape Si-particles. The three-dimensional morphology changes of fine eutectic Si-particles in both cast alloys, specifically fragmentation and spheroidizing, can be connected to changes in mechanical properties. View Full-Text
Keywords: particle morphology; heat treatment; aluminum cast alloy; mechanical properties; Ostwald ripening; nanotomography; phase-contrast imaging particle morphology; heat treatment; aluminum cast alloy; mechanical properties; Ostwald ripening; nanotomography; phase-contrast imaging
Show Figures

Figure 1

MDPI and ACS Style

Furuta, S.; Kobayashi, M.; Uesugi, K.; Takeuchi, A.; Aoba, T.; Miura, H. Observation of Morphology Changes of Fine Eutectic Si Phase in Al-10%Si Cast Alloy during Heat Treatment by Synchrotron Radiation Nanotomography. Materials 2018, 11, 1308.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop