Experimental study of the crystal structure of the Mg15 − xZnxSr3 ternary solid solution in the Mg–Zn–Sr system at 300 °C. (5th December 2015)

• Record Type: Journal Article
• Authors: Wang, Jian; Zhang, Yi-Nan; Hudon, Pierre; Jung, In-Ho; Chartrand, Patrice; Medraj, Mamoun
• Is Part Of: Materials & design. Volume 86(2016:Oct.)
• Page Start: 305
• Page End: 312
• Publication Date: 2015-12-05
• Subjects: Ternary compound -- Mg alloys -- Phase diagram -- Crystal structure -- X-ray -- SEM/EDS -- EPMA; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.07.038
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: A new ternary compound, Mg15 − x Znx Sr3 with extensive solid solubility in the Mg–Zn–Sr system was observed and studied using electron probe microanalysis (EPMA), scanning electron microscopy SEM, and X-ray techniques. The solid solubility limits of this compound were found to be Mg15 − x Znx Sr3 (0.24 ≤ x ≤ 10.58, at.%) at 300 °C using a diffusion couple and several equilibrated alloys. Analysis of the X-ray diffraction (XRD) patterns was carried out by Rietveld method. XRD data has shown that this solid solution crystallizes in the hexagonal P63 /mmc (194) space group with the Ni11 Si4 Sc3 prototype. The lattice parameters decrease linearly with decreasing Mg content indicating substitutional solid solubility. The fractional atomic occupancy of the 6h, 6g, 4f, 2b and 12k sites of this compound are function of Mg content. Graphical abstract: Highlights: Diffusion couples and alloys methods were designed for Mg15 − x Znx Sr3 compound investigation. The solid solubility limit of the Mg15 − x Znx Sr3 (0.24 ≤ x ≤ 10.58) ternary solid solution was determined. The crystal structure of Mg15 − x Znx Sr3 phase was determined to be hexagonal structure with Ni11 Si4 Sc3 prototype. The fractional atomic occupancy of 6h, 6g, 4f, 2b and 12k sites of Mg15 − x Znx Sr3 were functioned.