Фазовая диаграмма системы Al-Se

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Al-Se (Aluminum-Selenium) J.M. Howe The assessed phase diagram for the Al-Se system is similar to [Hansen], which was based on data from alloys of questionable purity [17Chi]. A limited amount of work has been performed on this system. The uncorrected data in [Hansen] indicate that the maximum liquidus curve, and hence the melting point of the intermediate phase Al2Se, lies at a temperature greater than 950 C. However, because of considerable volatilization of Se during melting, the liquidus curves are not adequately established and may occur at higher temperatures [72Ell]. The compound Al2Se3 is the only intermediate phase confirmed in the Al-Se system [66Ste]. The selenides Al2Se and Al2Se2 appear to be stable only in the gaseous state [68Fic, 70Uy]. In addition, there appear to be two eutectic reactions very near the melting points of pure Al and Se. Al appears to be essentially insoluble in (Se) [ 72Ell] and less than 0.2 at.% Se is soluble in (Al) [76Mon]. 17Chi: M. Chikashige and T. Aoki, Mem. Coll. Sci., Kyoto Imp. Univ., 2, 249- 254 (1917). 66Ste: G.A. Steigmann and J. Goodyear, Acta Crystallogr., 20, 617-619 (1966). 68Fic: P.J. Ficatora, J.W. Hastie, and J.L. Margrave, J. Phys. Chem., 72, 1660- 1663 (1968). 70Uy: O.M. Uy and J. Drowart, Trans. Faraday Soc., 67(V), 1293-1301 (1971). 72Ell: R.P. Elliott and F.A. Shunk, IIT Res. Inst. Rep. No. IITRI-B6082-5, 357- 359 (1972). 76Mon: L.F. Mondolfo, Aluminum Alloys: Structure and Properties, Butterworths, London, 367-368 (1976). Published in Bull. Alloy Phase Diagrams, 10(6), Dec 1989. Complete evaluation contains 1 figure, 3 tables, and 7 references. Special Points of the Al-Se System