Metallurgical and Materials Transactions A

, Volume 36, Issue 7, pp 1757–1767 | Cite as

Determination of the isothermal sections of the Al-Ni-Si ternary system at 750 °C and 850 °C

  • X. M. Pan
  • Z. P. Jin
  • J. -C. Zhao


The phase equilibria of the Al-Ni-Si ternary system at 850 °C and 750 °C have been investigated using scanning electron microscopy (SEM) and electron-probe microanalysis (EPMA). Isothermal sections at 850 °C and 750 °C were constructed based on experimental data from 53 alloys heat treated at 850 °C for 1200 hours and at 750 °C for 1440 hours, respectively. The phase equilibria among the following intermetallics and solid-solution phases are described: Ll2-Ni3(Al,Si), B2-NiAl, Ni5Si2, δ-Ni2Si, ϑ-Ni2Si(τ 4), Ni3Si2, NiSi, NiSi2, Ni2Al3, NiAl3, Ni2AlSi(τ 2), Ni3Al6Si(τ 3), Ni16AlSi9(τ 5), the fcc solid solution, and the diamond (Si) phase. In addition, a phase, temporarily designated as Ni5(Al,Si)3(τ 6), was observed for the first time at both 750 °C and 850 °C. This phase is probably the stabilization of Ni5Al3 by Si to higher temperatures than the binary Ni5Al3, which is only stable at <∼700 °C.


Material Transaction Isothermal Section Gray Phase Alloy Heat Equilibrium Microstructure 
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  1. 1.
    M. Bonnet, J. Ronez, and R. Castanet: Thermochimica Acta, 1989, vol. 155, pp. 39–56.CrossRefGoogle Scholar
  2. 2.
    B. Otani and K.N. Kenkyu: Study Met., 1930, vol. 7, pp. 666–86.Google Scholar
  3. 3.
    H.W.L. Phillips: J. Inst. Met., London, 1942, vol. 68, pp. 27–46.Google Scholar
  4. 4.
    R.W. Guard and E.A. Smith: J. Inst. Met., 1959, vol. 88, pp. 369–70.Google Scholar
  5. 5.
    N.V. Herman: Ser. Khimichno, Visnik L’Vivs’Kogo Derzhavnogo Univ., 1981, vol. 23, pp. 61–64.Google Scholar
  6. 6.
    O.S. Zarechyuk, N.V. Herman, T.I. Yanson, R.M. Rykhal, and A.A. Muraveva: Fazovye. Ravnov. Met. Splavakh. Izd. Nauka, Moscow, 1981, pp. 69–73 (in Russian).Google Scholar
  7. 7.
    S. Ochiai, Y. Oya, and T. Suzuki: Bull. PME (TIT), 1983, vol. 52, pp. 1–16.Google Scholar
  8. 8.
    A. Mitsuhashi, Y. Mitshima, and T. Suzuki: Bull. PME (TIT), 1984, vol. 54, pp. 7–15.Google Scholar
  9. 9.
    G. Muralidharan, J.W. Richardson, Jr., J.E. Epperson, and H. Chen: Scripta Mater., 1997, vol. 36, pp. 543–49.CrossRefGoogle Scholar
  10. 10.
    K.W. Richter: J. Alloys Compounds, 2002, vol. 338, pp. 43–50.CrossRefGoogle Scholar
  11. 11.
    K.W. Richter and H. Ipser: Intermetallics, 2003, vol. 11, pp. 101–09.CrossRefGoogle Scholar
  12. 12.
    M. Jain and S.P. Gupta: Mater. Characterization, 2003, vol. 51, pp. 243–57.CrossRefGoogle Scholar
  13. 13.
    K.W. Richter, K. Chandrasekaran, and H. Ipser: Intermetallics, 2004, vol. 12, pp. 545–54.CrossRefGoogle Scholar
  14. 14.
    F. Bosselet, J.C. Viala, C. Colin, B.F. Mentzen, and J. Bouis: Mater. Sci. Eng., 1993, vol. A167, pp. 147–54.Google Scholar
  15. 15.
    P. Villars and L.D. Calvert: Pearsons Handbook of Crystallographic Data for Intermetallic Phases, 2nd ed., ASM INTERNATIONAL, Materials Park, OH, 1991, vols. 1–4, pp. 948–4734.Google Scholar
  16. 16.
    K.W. Richter, Y. Prots, and Y. Grin: Z. Anorg. Allg. Chem., 2004, vol. 630, pp. 417–22.CrossRefGoogle Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2005

Authors and Affiliations

  • X. M. Pan
    • 1
  • Z. P. Jin
    • 2
  • J. -C. Zhao
    • 3
  1. 1.Ohio State UniversityColumbus
  2. 2.the School of Materials Science and EngineeringCentral South UniversityChangshaP.R. China
  3. 3.General Electric CompanyGE Global ResearchNiskayuna

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