Journal of Materials Science

, Volume 45, Issue 3, pp 824–830 | Cite as

Effect of microstructure on thermal expansion behaviour of nanocrystalline metallic materials

  • Stefano GialanellaEmail author
  • Francesco Marino


Materials properties, among which thermodynamic ones, are influenced by microstructural features. This is so also in the case of nanocrystalline materials, featuring average grain size below 100 nm. A reduced grain size involves that significant fractions of atoms are localised in grain boundary regions and this has remarkable effects on the resulting thermodynamic properties, like heat capacity, transition temperatures, coefficient of thermal expansion, etc. In the present work we consider the thermal expansion behaviour of ball-milled nanocrystalline metallic powders using dilatometric measurements. High-energy ball-milling, that is capable to achieve extremely high deformation degrees, induces in the milled powders microstructural defects, like vacancies, antisites, dislocations and planar faults. Another effect of milling is the reduction of the crystallite size, that, in the long run, may reach the nanometric range. In view of the microstructural changes that can be brought about by milling and of the numerous transformations occurring during the dilatometric runs, a comparative study has been conducted on intermetallic, NiAl and Ni3Al, and on a pure metal, nickel, powders. The results emerging from the experimental investigation are quite complex, owing to the complex defect structures that are present in the ball-milled powders. It turns out that the thermal expansion coefficient of the nanocrystalline powders increases as the average grain size is reduced. However, when the average grain size achieves very low values, the strain relaxation of the crystalline lattice and the rearrangement of grain boundary regions result in a reduction of the thermal expansion coefficient. Another aspect that emerges from the dilatometric curves is the interplay between recrystallization and reordering, i.e. the re-establishment of the long-range order in the intermetallic powders, that had been partially or fully eliminated by ball-milling.


NiAl Ni3Al Nickel Powder Thermal Expansion Behaviour Dilatometric Curve 


  1. 1.
    Gleiter H (2000) Acta Mater 48:1CrossRefGoogle Scholar
  2. 2.
    Siegel RW, Hahn H (1987) In: Yussouff M (ed) Current trends in the physics of materials. World Science Publications, SingaporeGoogle Scholar
  3. 3.
    Weissmuller J (1994) J Mater Res 9:4CrossRefGoogle Scholar
  4. 4.
    Fecht H (1990) Phys Rev Lett 65:610CrossRefGoogle Scholar
  5. 5.
    Fecht H (1990) Acta Metall Mater 38:1927CrossRefGoogle Scholar
  6. 6.
    Klam HJ, Hahn H, Gleiter H (1987) Acta Metall 35:2101CrossRefGoogle Scholar
  7. 7.
    Fang W, Lo C-Y (2000) Sens Actuators 84:310CrossRefGoogle Scholar
  8. 8.
    Kuru Y, Wohlschlogel M, Welzel U, Mittemeijer EJ (2007) Appl Phys Lett 90:24113CrossRefGoogle Scholar
  9. 9.
    Kuru Y, Wohlschlogel M, Welzel U, Mittemeijer EJ (2008) Surf Coat Technol 202:2306CrossRefGoogle Scholar
  10. 10.
    Suryanarayana C (2001) Prog Mater Sci 46:1CrossRefGoogle Scholar
  11. 11.
    Wright RN, Knibloe JR (1990) Acta Metall Mater 38:1993CrossRefGoogle Scholar
  12. 12.
    Gialanella S, Delorenzo R, Marino F, Guella M (1995) Intermetallics 3:1CrossRefGoogle Scholar
  13. 13.
    Gialanella S, Lutterotti L (1997) Prog Mater Sci 42:125CrossRefGoogle Scholar
  14. 14.
    Gialanella S, Delorenzo R, Marino F (1995) Mat Sci Forum 179–181:39CrossRefGoogle Scholar
  15. 15.
    Anthony L, Okamoto JK, Fultz B (1993) Phys Rev Lett 70:1128CrossRefGoogle Scholar
  16. 16.
    Cahn RW, Takeyama M, Norton JA, Liu CT (1991) J Mater Res 6:57CrossRefGoogle Scholar
  17. 17.
    Touloukian YS (1975) Thermal expansion: metallic elements and alloys. Plenum Press, New YorkCrossRefGoogle Scholar
  18. 18.
    Zhao YH, Sheng HW, Lu K (2001) Acta Mater 49:365CrossRefGoogle Scholar
  19. 19.
    Qian LH, Wang SC, Zhao YH, Lu K (2002) Acta Mater 50:3425CrossRefGoogle Scholar
  20. 20.
    Jang JS, Koch CC (1990) J Mater Res 5:498CrossRefGoogle Scholar
  21. 21.
    Lutterotti L, Gialanella S (1998) Acta Mater 46:101CrossRefGoogle Scholar
  22. 22.
    Gialanella S, Guella M, Barò MD, Malagelada J, Surinach S (1994) In: de Barbadillo A (ed) Proceedings of the 2nd international conference on structural applications of mechanical alloying, ASM international, Materials Park, OhioGoogle Scholar
  23. 23.
    Barò MD, Surinach S, Malagelada J, Clavaguera-Mora MT, Gialanella S, Cahn RW (1993) Acta Metall Mater 41:1065CrossRefGoogle Scholar
  24. 24.
    Surinach S, Malagelada J, Barò MD (1993) Mater Sci Eng A168:161CrossRefGoogle Scholar
  25. 25.
    Kumpmann A, Günther B, Kunze H-D (1993) Mater Sci Eng A168:165CrossRefGoogle Scholar
  26. 26.
    Rupp J, Birringer R (1987) Phys Rev B 36:7888CrossRefGoogle Scholar
  27. 27.
    Turi T, Erb U (1995) Mater Sci Eng A204:34CrossRefGoogle Scholar
  28. 28.
    Zhu YF, Lian JS, Jiang Q (2009) J Phys Chem C 113:16896CrossRefGoogle Scholar
  29. 29.
    Erb U, Palombo G, Szpunar B, Aust KT (1997) Nanostruct Mater 9:261–270CrossRefGoogle Scholar

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© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Dipartimento di Ingegneria dei Materiali e Tecnologie IndustrialiUniversità di TrentoMesiano, TrentoItaly
  2. 2.Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di TorinoTorinoItaly

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