Abstract
Previous investigations show that CaO additions have an effect on the microstructure and mechanical properties of commercial Mg alloys. Addition of CaO to pure Mg and Mg alloys results in the dispersion of Ca in the molten and solid Mg with no evidence of CaO. This paper reports on the reactions between Mg, Al and CaO measured by means of in situ synchrotron radiation diffraction during melting and solidification. The experiment was conducted on Mg-3Al wt% with CaO concentrations between 3 wt% and 10 wt% to study the effect of different Al:CaO ratios. The initial sample contained Mg, Al and CaO in powder state, pressed to cylindrical samples. The melting, the solidification and associated phase transformations were measured in a Bähr 805A/D dilatometer inside a sealed stainless steel crucible at the High Energy Materials Science Beamline P07 at PETRA III, DESY.
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References
J.-K. Lee, and S. K. Kim, “Effect of CaO Addition on the Ignition Resistance of Mg-Al Alloys,” Mater. T. JIM., 52 (2011) 1483–1488.
S.-H. Ha, J.-K. Lee, and S. K. Kim, “Effect of CaO on Oxidation Resistance and Microstructure of Pure Mg,” Mater. T. JIM., 49 (2008) 1081–1083.
J.-K. Lee, and S. K. Kim, “Effect of CaO composition on oxidation and burning behaviors of AM50 Mg alloy,” Trans. Nonferrous Met. Soc. China, 21 (2011) 23–27.
K. Kondoh, et al., “Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg-Al alloy,” Mater. Chem. Phys., 129 (2011) 631–640.
B.-S. You, W.-W. Park, and I.-S. Chung, “The effect of calcium additions on the oxidation behavior in magnesium alloys,” Scripta Mater., 42 (2000) 1089–1094.
I. Brain, and O. Knacke, Thermochemical Properties of Inorganic Substances, (Berlin, New York: Springer-Verlag, 1973)
P. Staron, et al., “ In Situ Experiments with Synchrotron High-Energy X-Rays and Neutrons,” Adv. Eng. Mat., 13 (2011) 658–663.
D. Tolnai, et al., “In situ synchrotron diffraction of the solidification of Mg4Y3Nd,” Mater. Lett., 102–103 (2013) 62–64.
P. Villars, and K. Cenzual, Pearson’s Crystal Data — Crystal Structure Database for Inorganic Compounds (on CD-ROM), (Ohio: ASM International, Materials Park, USA, Release 2012)
MSDS Number: C0407, Material safety data sheet, Avantor Performance Materials, http://www.avantormaterials.com/ (2009)
A. Janz, et al., “Thermodynamic modeling of the Mg-Al-Ca system,” Acta Materialia, 57 (2009), 682–694.
H. Cao, et al., “Experiments coupled with modeling to establish the Mg-rich phase equilibria of Mg-Al-Ca,” Acta Materialia, 56 (2008), 5245–5254.
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Wiese, B. et al. (2014). In Situ Synchrotron Radiation Diffraction during Melting and Solidification of Mg-Al Alloys Containing CaO. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_38
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DOI: https://doi.org/10.1007/978-3-319-48231-6_38
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48589-8
Online ISBN: 978-3-319-48231-6
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