Фазовая диаграмма системы As-Fe

К оглавлению: Другие диаграммы (Others phase diargams)


As-Fe (Arsenic-Iron) H. Okamoto The assessed phase diagram for the As-Fe system is based primarily on the data of [07Fri], [23Obe], [38Sve], [52Saw], [57Sve], and [60Cla], with review of the data of [34Jon], [53Saw], and [79Boz]. The equilibrium phases are (1) the liquid, L; (2) the rhombohedral terminal solid solution, (aAs); (3) orthorhombic FeS2-type As2Fe; (4) orthorhombic MnP-type AsFe; (5) high- temperature As2Fe3, with an unknown structure; (6) tetragonal Cu2Sb-type AsFe2; (7) the bcc terminal solid solution, (aFe); and (8) the fcc terminal solid solution, (gFe). Rhombohedral As5Fe12 exists under high pressures. The As-rich end of the assessed diagram is observed only under high pressures. The solubility of Fe in (aAs) at the eutectic temperature is ~0.07 at.% [60Cla] . No conclusive reports are available regarding the exact composition of As2Fe. The melting point is shown at 1020 C, because the melting point of a 30 at.% Fe alloy (1018 C) is nearly the same as the melting point of As2Fe [60Cla]. The phase field of As2Fe3 is ambiguous. At 1000 C, [07Fri] observed the peritectic formation of a compound with the approximate composition As4Fe5, which decomposes at a lower temperature (~800 C). [07Fri] also proposed As2Fe3, existing below 800 C. According to [53Saw], the high-temperature phase (As2Fe3) decomposes eutectoidally at 824 C, and the low-temperature phase does not exist. As2Fe3 was not found in a sintered product of Fe and As powder mixture at 470 C [63Pas]. [28Hag] found no evidence of phases corresponding to either form. Apparently, the high-temperature phase could not be retained. (gFe) with 0.22 to 1.68 at.% As transforms into lath-shaped martensite by rapid quenching [77Boz]. As5Fe12 forms by the decomposition reaction 7AsFe2 <259> As5Fe12 + 2AsFe at 1000 C and 30 kbar [83Maa]. The N‚el temperature of AsFe is -196 с 1 C [72Sel], and that of AsFe2 is ~50 [ 64Ach], 77.3 [82Cor], 80 [67Ach], ~82.3 [85Gre], 94 с 1 [73Gra], or 95 C [ 66Hol]. Further information on the spin configuration and other magnetic properties of AsFe2 can be found in [64Kat], [65Kat], [66Hol], [66Kat], [67Ach] , [73Gra], [76Raj], and [82Cor]. The Curie temperature of aFe is 770 C [82Swa]. The composition dependence of the Curie temperature of (aFe) was measured by [54Saw] (assessed diagram). The Curie temperature could not be well defined earlier by [12Lie] and [23Obe]. 07Fri: K. Friedrich, Metallurgie, 4(5), 129-137 (1907) in German. 12Lie: J. Liedgens, Stahl Eisen, 32(51), 2109-2115 (1912) in German. 23Obe: P. Oberhoffer and A. Gallaschik, Stahl Eisen, 43(12), 398-400 (1923) in German. 28Hag: G. Hagg, Z. Kristallogr., 68, 470-471 (1928) in German. 29Hag: G. Hagg, Z. Kristallogr., 71, 134-136 (1929) in German. 32Bue: M.J. Buerger, Z. Kristallogr., 97, 504-513 (1932) in German. 34Jon: W.D. Jones, J. Iron Steel Inst., 130, 429-437 (1934). 36Ela: M. Elander, G. Hagg, and A. Westgren, Ark. Kem., Mineral. Geol. B, 12(1) , 6 p (1936). 38Sve: V.N. Svechnikov and V.N. Gridnev, Metallurg., 13(1), 13-19 (1938). 41Pea: M.A. Peacock, Trans. R. Soc. Can., Sec. IV, 35, 105-113 (1941). 52Saw: H. Sawamura and T. Mori, Mem. Fac. Eng. Kyoto Univ., 14, 129-144 (1952). 53Saw: H. Sawamura, et al., Tetsu to Hagane, 39, 776-777 (1953) in Japanese; quoted in [Hansen]. 54Saw: H. Sawamura and T. Mori, Mem. Fac. Eng. Kyoto Univ., 16, 182-189 (1954). 57Hey: R.D. Heyding and L.D. Calvert, Can. J. Chem., 35(5), 449-457 (1957). 57Sve: V.N. Svechnikov and A.K. Shurin, Dop. Akad. Nauk Ukr. RSR, (1), 27-29 ( 1957) in Ukrainian. 58Sve: V.N. Svechnikov, V.M. Pan, and A.K. Shurin, Fiz. Met. Metalloved., 6(4), 662-664 (1958) in Russian; TR: Phys. Met. Metallogr., 6(4), 80-82 (1958). 60Cla: L.A. Clark, Econ. Geol., 55(7), 1345-1381 (1960). 60Hey: R.D. Heyding and L.D. Calvert, Can. J. Chem., 38(2), 313-316 (1960). 60Swa: H.E. Swanson, M.I. Cook, E.H. Evans, and J.H. de Groot, NBS Circ., 539( 10), 34-36 (1960). 62Ber: L.G. Berry and R.M. Thompson, Geol. Soc. Am. Mem., 85, 281 p (1962). 63Pas: R. Pastant, C.R. Congr. Nat. Soc. Savantes Paris, Dept. Sect. Sci., 87, 605-609 (1963) in French. 63Ros: E.H. Roseboom, Am. Mineral., 48(2), 271-299 (1963). 64Ach: N. Achiwa, private communication to [64Kat] (1964). 64Kat: H. Katsuraki, J. Phys. Soc. Jpn., 19(10), 1988 (1964). 65Kat: H. Katsuraki and K. Suzuki, J. Appl. Phys., 36(2), 1094-1095 (1964). 66Hol: L. Hollan, Ann. Chim. (Paris), 1(11-12), 437-448 (1966) in French. 66Kat: H. Katsuraki and N. Achiwa, J. Phys. Soc. Jpn., 21(11), 2238-2243 (1966) . 67Ach: N. Achiwa, S. Yano, M. Yuzuri, and H. Takaki, J. Phys. Soc. Jpn., 22(1), 156-157 (1967). 68Hol: H. Holseth and A. Kjekshus, Acta Chem. Scand., 22(10), 3273-3283 (1968). 69Sel: K. Selte and A. Kjekshus, Acta Chem. Scand., 23(6), 2047-2054 (1969). 72Kje: A. Kjekshus and K.E. Skaug, Acta Chem. Scand., 26(6), 2554-2556 (1972). 72Ros: G. Rosenthal, G. Kershaw, and A. Wold, Mater. Res. Bull., 7(5), 479-487 (1972). 72Sel: K. Selte, A. Kjekshus, and A.F. Andresen, Acta Chem. Scand., 26(8), 3101-3113 (1972). 73Gra: F. Grandjean, A. Gerald, and R. Sobry, Int. J. Magn., 4(1), 1-4 (1972). 74Kje: A. Kjekshus, T. Rakke, and A.F. Andresen, Acta Chem. Scand. A, 28(9), 996-1000 (1974). 76Raj: P. Raj and S.K. Kulshreshtha, Phys. Scr., 14(3), 125-128 (1976). 77Boz: B.I. Bozic and R.J. Lucic, J. Mater. Sci., 12, 751-756 (1977). 79Boz: B. Bozic, Serb. Acad. Sci. Arts, Glas., (14), 1-18 (1979) in Serbo- Croatian; Bull. Acad. Serb. Sci. Arts, Cl. Sci. Tech., (14), 1-16 (1979) in German. 82Cor: L.M. Corliss, J.M. Hastings, W. Kunnmann, R.J. Begun, M.F. Collins, E. Gurewitz, and D. Mukamel, Phys. Rev. B, 25(1), 245-253 (1982). 82Swa: L.J. Swartzendruber, Bull. Alloy Phase Diagrams, 3(2), 161-165 (1982). 83Maa: S. Maaref, R. Madar, P. Chaudouet, R. Fruchart, J.P. Senateur, M.T. Averbuch-Pouchot, M. Bacmann, A. Durif, and P. Wolfers, Mater. Res. Bull., 18, 473-480 (1983) in French. 84Lym: P.S. Lyman and C.T. Prewitt, Acta Crystallogr. B, 40(1), 14-20 (1984). 85Gre: P.H. Greenwood and P. de V. du Plessis, Phys. Status Solidi (b), 127, K19-K23 (1985). 86Kra: A.M. van der Kraan and K.H.J. Buschow, Physica B, 138, 55-62 (1986). Submitted to the APD Program. Complete evaluation contains 1 figure, 3 tables, and 56 references. Special Points of the As-Fe System