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An atomistic investigation of branching mechanism during lamellar eutectic solidification
- Source :
- Computational Materials Science. 196:110536
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Branching is a fundamental mechanism for lamellar spacing adjustment during eutectic solidification. However, the kinetic mechanism of branching is still unclear due to the lack of in-situ observations. In this work, utilizing the binary phase-field crystal model, we investigated the lamellar branching process during eutectic directional growth on an atomic scale. By visualizing the new lamella creation process, we found that new α lamellae form from heterogeneous nucleation at the front of the β/liquid interface. After further simulating eutectic solidification with different temperatures and lattice-mismatches, we found that the conditions that promote the heterogeneous nucleation could also stimulate lamellar branching. Conversely, if we suppress the heterogeneous nucleation process, lamellar branching will be hard to emerge, and the eutectic morphology will be a 2λ oscillating pattern.
- Subjects :
- Materials science
General Computer Science
Nucleation
General Physics and Astronomy
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Branching (polymer chemistry)
01 natural sciences
Atomic units
0104 chemical sciences
Computational Mathematics
Lamella (surface anatomy)
Mechanics of Materials
Chemical physics
Crystal model
General Materials Science
Lamellar structure
0210 nano-technology
Eutectic system
Branching process
Subjects
Details
- ISSN :
- 09270256
- Volume :
- 196
- Database :
- OpenAIRE
- Journal :
- Computational Materials Science
- Accession number :
- edsair.doi...........e849f6fd4abd42eaf0b9508aba3d5af5