Фазовая диаграмма системы Mn-Ni

К оглавлению: Другие диаграммы (Others phase diargams)

Mn-Ni (Manganese-Nickel) N.A. Gokcen The assessed Mn-Ni phase diagram is based largely on the results of [32Dou], [ 48Kos], [49Kur], [51Col], [52Ere1], [52Ere2], [57Hel], [58Hah], and [69Tsi]. The Curie temperature of 520 C from [69Tsi], coincident with the peritectoid temperature, is in agreement with [58Hah] and [41Vol]. The Curie temperatures within the g› phase were determined magnetically by [58Hah] and rechecked by [ 69Tsi]. The Curie temperatures from about 86 to 100 at.% Ni, measured by the magnetometry of [69Tsi], are preferred to the earlier and higher temperatures obtained by [Hansen] from their interpolation of the earlier data. The N‚el temperature of 300 C for f, that of 260 C for h››, increasing within h›› to 360 C, and that of 240 C for x› were determined by [69Tsi] with magnetometry. The ordered fcc g› region is strongly ferromagnetic; MnNi3 quenched from the temperatures above the (gMn,Ni)/[(gMn,Ni) + g›] boundary is paramagnetic [31Kay, 41Vol, 58Hah]. x› is probably metamagnetic [69Tsi] (remnant, weakly magnetic). h›› and f are antiferromagnetic [59Kas, 68Kre, 68Pal], as is Mn3Ni [69Tsi]. The structure of splat quenched alloys with Ni concentrations at 4.7 at.% intervals within 4.7 to 48.3 at.% Ni were investigated by [81Ogd] using small angle and ordinary X-ray scattering. The short-range order of atoms was described by an fcc lattice. Radial distribution of atoms was obtained, and it was shown that the lattice parameter first increases up to about 19 to 24 at.% Ni and then decreases. Water quenching of samples from 927 C and containing 11.3 to 28.6 at.% Ni yielded an acicular fct structure [65Pat], only suggesting possible martensite transformation. The transformation of h into h› is martensitic of nearly thermoelastic nature, according to [85Ada]. Martensitic structure was observed in the alloys within the region with 50 at.% Ni or less after quenching. The martensite plates were internally twinned on {111} planes. Slow cooling from h and h + (gMn,Ni) regions with less than 50 at.% Ni became tempered and exhibited low-density twins crossing one another. Ni-rich quenched alloys showed a finely twinned structure different from martensite, with a twin plane of {101} due to ordering. The crystal structure of both Ni-rich and Ni-lean phases were the same L10 structure [85Ada]. 31Kay: S. Kaya and A. Kussman, Z. Phys. 72, 293-309 (1931) in German. 32Dou: A. Dourdine, Rev. M‚tall., 29, 507-518 and 565-573 (1932) in French. 41Vol: N. Volkenstein and A. Komar, Zh. Eksp. Teor. Fiz., 11, 723-724 (1941) in Russian. 48Kos: W. Koster and W. Rauscher, Z. Metallk., 39, 178-184 (1948) in German. 49Kur: N.N. Kurnakov and M.Y. Troneva, Dokl. Akad. Nauk SSSR, 68, 73-76 (1949) in Russian. 51Col: B.R. Coles and W. Hume-Rothery, J. Inst. Met. (London), 80, 85-92 (1951- 52). 52Ere1: V.N. Eremenko and V.I. Skuratovoskaya, Ukr. Khim. Zh., 18, 213-218 ( 1952) in Russian. 52Ere2: V.N. Eremenko and T.D Shtepa, Ukr. Khim. Zh., 18, 219-231 (1952) in Russian. 57Hel: A. Hellawell and W. Hume-Rothery, Philos. Trans. R. Soc. (London), A, 249, 417-459 (1957). 58Hah: R. Hahn and E. Kneller, Z. Metallkd., 49, 426-441 (1958) in German. 59Kas: J.S. Kasper and J.S. Kouvel, J. Phys. Chem. Solids, 11, 231-238 (1959). 65Pat: W.R. Patterson, Trans. Metall. Soc. AIME, 223, 438-440 (1965). 68Kre: E. Kren, E. Nagy, I. Nagy, L. Pal, and P. Szabo, J. Phys. Chem. Solids, 29, 101-108 (1968). 68Pal: L. Pal, E. Kren, G. Kadar, P. Szabo, and T. Tarnoczi, J. Appl. Phys., 39, 538-544 (1968). 69Tsi: K.E. Tsiuplakis and E. Kneller, Z. Metallkd., 60, 433-438 (1969) in German. 81Ogd: N.F. Ogdansky and V.G. Otroschenko, Fiz. Met. Metalloved., 51, 1099- 1101 (1981) in Russian. 85Ada: K. Adachi and C.M. Wayman, Metall. Trans. A, 12, 1567-1579 and 1581- 1597 (1985). Published in Phase Diagrams of Binary Nickel Alloys, 1991. Complete evaluation contains 2 figures, 6 tables, and 46 references. Special Points of the Mn-Ni System