Influence of static magnetic field on the heterogeneous nucleation behavior of Al on single crystal Al 2 O 3 substrate
Materialia, ISSN: 2589-1529, Vol: 13, Page: 100847
2020
- 7Citations
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Article Description
This paper investigates the heterogeneous nucleation behavior of Al on single crystal Al 2 O 3 substrate under the influence of static magnetic field (SMF). The nucleation temperature of the Al melt on the substrate was measured to decrease ~2.9°C under SMF, i.e. the undercooling was enhanced with the application of SMF. Using electric back-scatter diffraction (EBSD) and high-resolution transmission electric microscope (HRTEM), the interfacial crystal orientation matching of Al/Al 2 O 3 was found to change dramatically, from {110}[011]Al~//{ 101¯0 }[0001]Al 2 O 3 without SMF to ~11.4 o between {110}[ 1¯12 ]Al and { 101¯0 }[0001]Al 2 O 3 under SMF, indicating that the SMF can increase the lattice misfit of Al/Al 2 O 3 interface. The lattice matching deviation caused by SMF was supposed to lead to the increase of interfacial free energy of the nucleus/substrate interface, and thus the formation of critical nucleus and the undercooling were modified. The results demonstrate that SMF is capable of influencing the heterogeneous nucleation behavior of the melt.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2589152920302635; http://dx.doi.org/10.1016/j.mtla.2020.100847; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85089537992&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2589152920302635; https://dx.doi.org/10.1016/j.mtla.2020.100847
Elsevier BV
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