Microstructure Evolution Characteristics during Rapid Solidification of Ca-Mg Alloys with Different Mg Contents

Abstract:

The molecular dynamics simulation studies on the microstructure evolution properties of liquid Ca-Mg alloys during the rapid solidifications have been performed. The simulated structure factor S(q) of Ca₇Mg₃ is well agreed with the experimental data. Results indicate that the glass transition temperatures of CaMg₂ and Ca₇Mg₃ are 590 K and 550 K respectively with the cooling rate of 1×10¹² K/s. It also found that icosahedron is much easier to form in CaMg₂ system, and Ca-Mg alloys with more Mg content indicate higher glass forming ability.

• Periodical: Applied Mechanics and Materials (Volumes 651-653)
• Pages: 252-255
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.651-653.252
• Online since: September 2014
• Authors: Li Li Zhou, Xiao Hui Qiu, You Lin Peng*
• Keywords: Ca-Mg Alloy, Icosahedron, Microstructure, Molecular Dynamic Simulation, Rapid Solidification

References

[1] J Walker, S Shadanbaz, TBF Woodfield, MP Staiger, GJ Dias. 2014. Magnesium biomaterials for orthopedic application: A review from a biological perspective. J Biomed Mater Res Part B 2014: 00B: 001–016.

DOI: 10.1002/jbm.b.33113

[2] R. Zeng, W. Dietzel, F. Witte, N. Hort and C. Blawert: Advanced Engineering Materials Vol 10 (2008): P. B3-B14.

DOI: 10.1002/adem.200800035

[3] Z. J. Li, X. N. Gu, S. Q. Lou and Y. F. Zheng: Biomaterial Vol 29 (2008): P. 1329-1344.

[4] Z. Y. Hou, L. X. Liu, R. S. Liu, Z. A. Tian and J. G. Wang: J. Appl. Phys. Vol 107 (2010): P. 083511-083517.

[5] D. W. Qi and S. Wang: Phys. Rev. B. Vol 44 (1991): P. 884-887.

[6] F. X. Liu, R. S. Liu, Z. Y. Hou, H. R. Liu, Z. A. Tian and L. L. Zhou: Ann. Physics. Vol 324 (2009): P. 332-342.

[7] S. Wang and S. K. Lai: J. Phys. F: Metal. Phys. Vol 10 (1980): P. 2717-2737.

[8] D. H. Li, X. R. Li and S. Wang: J. Phys. F: Metal. Phys. Vol 16 (1986): P. 309-321.

[9] W. G. Hoover, A. J. C. Ladd and B. Moran: Phys. Rev. Lett. Vol 48 (1982): P. 1818-1820.

[10] D. J. Evans: J. Chem. Phys. Vol 78 (1983): P. 3297-3302.

[11] E. Nassif, P. Lamparter and S. Steev: Z. Naturforsch Vol 38a (1983): P. 1206.

[12] S. S. Jaswal and J. Hafner: Phys. Rev. B. Vol 38 (1988): P. 7311-7319.

[13] K. Vollmayr, W. Kob and K. Binder: Phys. Rev. B. Vol 54 (1996): P. 15808.

[14] J. G. Kim and Y. W. Kim: Materials and Corrosion Vol 52 (2001): P. 137-139.

[15] W. C. Kim, J. G. Kim, J. Y. Lee and H. K. Seok: Mater. Lett. Vol 62 (2008): P. 4146-4148.

[16] J. D. Honeycutt and H. C. Anderson: J. Phys. Chem. Vol 91 (1987): P. 4950-4963.