Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T01:37:29.107Z Has data issue: false hasContentIssue false
  • English
  • Français

In situ observations of the rapid solidification for undercooled Al30Si70 alloy melt

Published online by Cambridge University Press:  13 January 2016

Junfeng Xu ,
Long Diao ,
Junhui Yan ,
Bo Dang ,
Man Zhu ,
Fange Chang  and
Zengyun Jian
Junfeng Xu*
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Long Diao
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Junhui Yan
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Bo Dang
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Man Zhu
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Fange Chang
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
Zengyun Jian*
Affiliation:
The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Xi'an Technological University, Xi'an, Shaanxi 710021, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Rapid solidification of Al30Si70 alloy was studied via electromagnetic levitation technique. The solidification kinetics and the morphology of the solidification front of the Si phase were analyzed in situ by using a high-speed video camera and subsequent microstructural analysis of as-solidified samples. It shows that solidification of the sample always starts from one point. After that, nucleation continues to proceed at the interface front during growth. The morphology of primary Si transforms from faceted wafer to nonfaceted equiaxed grain and the grain size decreases with increase of undercooling. At small undercooling, the growth velocity of primary Si decreases with time and the floated Si wafers have a trend to agglomerate, while at large undercooling, the nucleation rate decreases with time, which are explained by the fact that silicon content, undercooling and density at the solid–liquid interface change with time in solidification. Finally, the nucleation rate and growth velocity were discussed in combination of classical theory.

Keywords

rapid solidificationSiscanning electron microscopy (SEM)
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 2 , 28 January 2016 , pp. 222 - 231
Copyright
Copyright © Materials Research Society 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Nozaki, K., Nagashio, K., and Kuribayashi, K.: In-situ observation of solidification behavior from undercooled alpha-Fe2Si5 melt using an electromagnetic levitator. Rev. Adv. Mater. Sci. 18, 439 (2008).Google Scholar
Aoyama, T., Takamura, Y., and Kuribayashi, K.: Dendrite growth processes of silicon and germanium from highly undercooled melts. Metall. Mater. Trans. A 30, 1333 (1999).Google Scholar
Aoyama, T. and Kuribayashi, K.: Influence of undercooling on solid/liquid interface morphology in semiconductors. Acta Mater. 48, 3739 (2000).Google Scholar
Binder, S., Galenko, P.K., and Herlach, D.M.: The effect of fluid flow on the solidification of Ni2B from the undercooled melt. J. Appl. Phys. 115, 053511 (2014).Google Scholar
Luo, S.B., Wang, W.L., Chang, J., Xia, Z.C., and Wei, B.: A comparative study of dendritic growth within undercooled liquid pure Fe and Fe50Cu50 alloy. Acta Mater. 69, 355 (2014).Google Scholar
Zhang, H., Nakajima, K., Wu, R., Wang, Q., and He, J.: Prediction of solidification microstructure and columnar-to-equiaxed transition of Al-Si alloy by two-dimensional cellular automaton with “decentred square” growth algorithm. ISIJ Int. 49, 1000 (2009).Google Scholar
Jackson, K.A. and Hunt, J.D.: Transparent compounds that freeze like metals. Acta Metall. Sin. 13, 1212 (1965).Google Scholar
Somboonsuk, K., Mason, J.T., and Trivedi, R.: Interdendritic spacing: Part I. Experimental studies. Metall. Mater. Trans. A 15, 967 (1984).CrossRefGoogle Scholar
Ruvalcaba, D., Mathiesen, R.H., Eskin, D.G., and Arnberg, L., and Katgerman, L.: In situ observations of dendritic fragmentation due to local solute-enrichment during directional solidification of an aluminum alloy. Acta Mater. 55, 4287 (2007).Google Scholar
Böyük, U. and Maraşlı, N.: Investigation of liquid composition effect on Gibbs–Thomson coefficient and solid–liquid interfacial energy in SCN based binary alloys. Mater. Charact. 59, 998 (2008).CrossRefGoogle Scholar
Wang, K., Wang, H., Liu, F., and Zhai, H.: Modeling dendrite growth in undercooled concentrated multi-component alloys. Acta Mater. 61, 4254 (2013).CrossRefGoogle Scholar
Xu, J.F., Liu, F., and Zhang, D.: In situ observation of solidification of undercooled hypoeutectic Ni–Ni3B alloy melt. J. Mater. Res. 28, 1891 (2013).Google Scholar
Xu, J.F., Liu, F., and Dang, B.: Phase selection in undercooled Ni-3.3 Wt Pct B alloy melt. Metall. Mater. Trans. A 44, 1401 (2013).Google Scholar
Turnbull, D.: Kinetics of solidification of supercooled liquid mercury droplets. J. Chem. Phys. 20, 411 (1952).Google Scholar
Jian, Z.Y. and Jie, W.Q.: Criterion for judging the homogeneous and heterogeneous nucleation. Metall. Mater. Trans. A 32, 391 (2001).Google Scholar
Trivedi, R., Jin, F., and Anderson, I.E.: Dynamical evolution of microstructure in finely atomized droplets of Al-Si alloys. Acta Mater. 51, 289 (2003).Google Scholar
Boettinger, W.J., Coriell, S.R., Trivedi, R., Mehrabian, R., and Parrish, P.A.: Application of dendritic growth theory to the interpretation of rapid solidification microstructures. In Rapid Solidification Processing: Principles and Technologies, Mehrabian, R. and Parrish, P.A., eds. (Claitor’s Publishing: Baton Rouge, LA, 1988); p. 13.Google Scholar
Liu, R.P., Volkmann, T., and Herlach, D.M.: Simulation of macrosegregation and solidification microstructure evolution for Al-Si alloy by coupled cellular automaton-finite volume model. Acta Mater. 49, 439 (2001).Google Scholar
Jian, Z.Y., Yang, X.Q., Chang, F.E., and Jie, W.Q.: Solid-liquid interface energy between silicon crystal and silicon-aluminum melt. Metall. Mater. Trans. A 41, 1826 (2010).Google Scholar
Zhang, H.W., Nakajima, K., Wang, E.G., and He, J.C.: Simulation of macrosegregation and solidification microstructure evolution for Al-Si alloy by coupled cellular automaton–finite volume model. Chin. J. Nonferrous Met. 22, 1883 (2012).Google Scholar
Wang, H.F., Liu, F., Chen, Z., Yang, G.C., and Zhou, Y.H.: Analysis of non-equilibrium dendrite growth in a bulk undercooled alloy melt: Model and application. Acta Mater. 55, 497 (2007).CrossRefGoogle Scholar
Supplementary material: File

Xu supplementary material

Xu supplementary material 1

Download Xu supplementary material(File)
File 444.7 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 2

Download Xu supplementary material(File)
File 380 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 3

Download Xu supplementary material(File)
File 158.8 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 4

Download Xu supplementary material(File)
File 138.9 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 5

Download Xu supplementary material(File)
File 146.7 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 6

Download Xu supplementary material(File)
File 154.1 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 7

Download Xu supplementary material(File)
File 154.3 KB
Supplementary material: File

Xu supplementary material

Xu supplementary material 8

Download Xu supplementary material(File)
File 159.9 KB