The Ca-Rich Corner of the Al-Ca-Zn System

Abstract:

In this work, the partial isothermal section of the Al-Ca-Zn system in the region between 33.3 and 100 at.% Ca has been investigated at 350°C using key alloys. The actual composition of the alloys is measured by inductively coupled plasma technique. Phase relations and solubility limits of the binary and ternary compounds have been determined by means of electron probe microanalysis and X-ray diffraction. In the current work, a new ternary compound has been identified in this region with the Al₉Ca₃₁Zn₁₀ (IM1) composition. Binary compound Al₁₄Ca₁₃ (IM2) has an extended solid solubility into the ternary system. The homogeneity ranges of the Al₂Ca, the MgNi₂-type C36 phase Al_2-xCaZn_x (0.28≤x≤0.70) (IM3) at 350°C and CaZn₂ compounds in the pseudobinary Al₂Ca-CaZn₂ section have been determined at 350°C and the results are combined with the literature to construct the partial vertical Al₂Ca-CaZn₂ section and partial isothermal Al-Ca-Zn section at 350°C.

• Periodical: Advanced Materials Research (Volume 409)
• Pages: 51-56
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.409.51
• Online since: November 2011
• Authors: Shabnam Konica, Yi Nan Zhang, Dmytro Kevorkov, Mamoun Medraj
• Keywords: Electron Probe Microanalysis, Phase Diagram, Ternary Compounds, X-Ray Diffraction (XRD)

References

[1] D.M. Moore, L.R. Morris, A new superplastic aluminum sheet alloy, Material Science and Engineering, Vol. 43, Issue 1 1980, pp.85-92.

DOI: 10.1016/0025-5416(80)90211-6

[2] D. Wenwen, S. Yangshan, M. Xuegang, X. Feng, Z. Min, W. Dengyun, Microstructure and mechanical properties of Mg–Al based alloy with calcium and rare earth additions, Materials Science and Engineering, Vol. 356, Issue 1-7, 2003, pp.1-7.

DOI: 10.1016/s0921-5093(02)00551-8

[3] N. Kono, Y. Tsuchida, S. Muromachi and H. Watanabe, Study of the Al-Ca-Zn ternary phase diagram, Light Metals, Vol. 35, 1985, pp.574-580.

DOI: 10.2464/jilm.35.574

[4] I.N. Ganiev, M. S. Shukroev and K.M. Nazarov, Effect of phase composition on the electrochemical behavior of Aluminum-Zinc-Calcium alloys, Zhurnal Prikladnoi Khimii, Vol. 68, Issue 10, 1995, pp.1646-1649.

[5] I.N. Gantsev, K.M. Nazarov, M.M. Khakdodov and N.I. Gantseva, Interaction of binary eutectics in Al Zn-Ca (Sr, Ba) Systems, Evtektika V, Mizhnarodna Konferentsiya, Dnepropetrovsk, National Metallurgical Academy of Ukraine, Dnepropetrovsk, Ukraine, 2000, pp.56-58.

[6] K. Soderberg, M. Bostrom, Y. Kubota, T. Nishimatsu. R. Niewa, U. Haussermann, Y. Grin, and O. Terasaki, Crystal structures and phase stability in pseudobinary CaAl2-xZnx, Journal of Solid State Chemistry, Vol. 179, Issue 8, 2006, p.2690–2697.

DOI: 10.1016/j.jssc.2006.05.018

[7] M. Pani, L. Fornasini and F. Merlo, The CaAg2—CaZn2—CaAl2 pseudoternary system: crystal structures and structural stability, Zeitschrift für Kristallographie: Vol. 222, Issue 5, 2006, pp.218-225.

DOI: 10.1524/zkri.2007.222.5.218

[8] G. Cordier, E. Czech and H. Schafer, CaAl2Zn2, The First Example of an Inverse, ThCr2Si2 Structure, Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, Vol. 39B, Issue 12, 1984, pp.1629-1632.

[9] S. Wasiur-Rahman, M. Medraj, A thermodynamic description of the Al-Ca-Zn ternary system, CALPHAD: Computer Coupling of Phase Diagrams and Thermochemistry, Vol. 33, Issue 3, 2009, pp.584-598.

DOI: 10.1016/j.calphad.2009.06.001

[10] B. Huang, J. D. Corbett, Two new binary Calcium-Aluminum compounds: Ca13Al14, with a novel Two-Dimensional aluminum network, and Ca8Al3, and Fe3Al-Type, Inorganic Chemistry, Vol. 37, 1998, pp.5827-5833.

DOI: 10.1002/chin.199905018