Фазовая диаграмма системы Ag-Sr

К оглавлению: Другие диаграммы (Others phase diargams)


Ag-Sr (Silver-Strontium) M.R. Baren The assessed Ag-Sr phase diagram is based on the work of [70Heu] for compositions of 0 to 30 at.% Sr, and the remainder of the diagram is from [ 30Wei]. The following compounds have been identified: Ag5Sr, Ag4Sr, Ag2Sr, AgSr, Ag2Sr3, and Ag3Sr7. The compound designated as Ag5Sr3 by [30Wei] is probably the compound Ag2Sr identified by [65Kos]. The region of the diagram between 33.3 and 37.5 at.% Sr is therefore in doubt. The only reaction in the Sr-rich portion of the diagram as determined by [30Wei] is the eutectic reaction between (Sr) and Ag2Sr3 at 436 C and 76.5 at.% Sr. However, [84Mer] determined the existence of a new phase, Ag3Sr7, which probably forms peritectically at a temperature near the eutectic point. Therefore, the diagram in the region of the eutectic at 436 C is also in doubt. 30Wei: F. Weibke, Z. Anorg. Chem., 193, 297-310 (1930). 65Kos: V.W. Koster and J. Meixner, Z. Metallkd., 56, 695-703 (1965). 70Heu: T. Heumann and N. Harmsen, Z. Metallkd., 61(12), 906-908 (1970). 81Mer: F. Merlo and M.L. Fornasini, Acta Crystallogr. B, 37, 500-503 (1981). 84Mer: F. Merlo and M.L. Fornasini, Rev. Chim. Mineral., 21, 273-278 (1984). Published in Bull. Alloy Phase Diagrams, 11(2), Apr 1990. Complete evaluation contains 1 figure, 2 tables, and 9 references. 1