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Novel nanoscale precipitate structures in ion-irradiated Cu1−xVx alloys: “Cherry-pit” formation

Published online by Cambridge University Press:  18 December 2014

Brad Stumphy ,
Robert S. Averback  and
Pascal Bellon
Brad Stumphy
Affiliation:
Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
Robert S. Averback
Affiliation:
Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
Pascal Bellon*
Affiliation:
Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The nanoscale precipitation induced by 1.8 MeV ion irradiation in Cu1−xVx thin films, with x ≈ 0.09 and 0.91, was studied by atom probe tomography. For the Cu91V9 alloys, irradiation in the range of 300–500 °C led to steady-state compositional patterning of V-rich nanoprecipitates. V nanoprecipitates larger than ∼10 nm in diameter, moreover, contained Cu-rich cores, resulting in an unusual “cherry-pit” nanostructure. The number of these pits within one precipitate increased with the precipitate size, but with the volume fraction of pits within a given precipitate remaining roughly constant, from ∼1.5 to 5%. Similar irradiations performed on V91Cu9 also resulted in an enhanced precipitation reaction, but with smaller Cu-rich nanoprecipitates, <3 nm in diameter, and no “cherry pits.” These results are rationalized using recent atomistic simulations that have explored the conditions for stabilizing by ion irradiation “cherry-pit” nanostructures in immiscible A–B alloy systems, such as Cu–V.

Keywords

Curadiation effectsnanostructure
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 2 , 28 January 2015 , pp. 170 - 178
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Nelson, R.S., Mazey, D.J., and Hudson, J.A.: Stability of precipitates in an irradiation environment. J. Nucl. Mater. 44, 318–330 (1972).Google Scholar
Schmitz, G., Ewert, J.C., Harbsmeier, F., Uhrmacher, M., and Haider, F.: Phase stability of decomposed Ni-Al alloys under ion irradiation. Phys. Rev. B: Condens. Matter Mater. Phys. 63, 2241131 (2001).Google Scholar
Krasnochtchekov, P., Averback, R.S., and Bellon, P.: Phase separation and dynamic patterning in Cu1−xCox films under ion irradiation. Phys. Rev. B 72, 174102 (2005).Google Scholar
Chee, S.W., Stumphy, B., Vo, N.Q., Averback, R.S., and Bellon, P.: Dynamic self-organization in Cu alloys under ion irradiation. Acta Mater. 58, 4088–4099 (2010).Google Scholar
Martin, G. and Bellon, P.: Driven alloys. In Solid State Physics - Advances in Research and Applications, Vol. 50, Academic Press Inc: San Diego, 1997; pp. 189–331.Google Scholar
Averback, R.S. and de la Rubia, T.D.: Displacement damage in irradiated metals and semiconductors. Solid State Phys. 51, 281–402 (1998).Google Scholar
Enrique, R.A., Nordlund, K., Averback, R.S., and Bellon, P.: Simulations of dynamical stabilization of Ag-Cu nanocomposites by ion-beam processing. J. Appl. Phys. 93, 2917–2923 (2003).Google Scholar
Enrique, R.A. and Bellon, P.: Compositional patterning in systems driven by competing dynamics of different length scale. Phys. Rev. Lett. 84, 2885 (2000).Google Scholar
Enrique, R.A. and Bellon, P.: Compositional patterning in immiscible alloys driven by irradiation. Phys. Rev. B 6313, 134111 (2001).Google Scholar
Stumphy, B., Chee, S.W., Vo, N.Q., Averback, R.S., Bellon, P., and Ghafari, M.: Irradiation-induced patterning in dilute Cu-Fe alloys. J. Nucl. Mater. 453, 66–74 (2014).Google Scholar
Shu, S., Bellon, P., and Averback, R.S.: Complex nanoprecipitate structures induced by irradiation in immiscible alloy systems. Phys. Rev. B: Condens. Matter Mater. Phys. 87, 144102 (2013).Google Scholar
Ziegler, J.F., Ziegler, M.D., and Biersack, J.P.: SRIM: The Stopping and Range of Ions in Matter (2008). http://www.srim.org/.Google Scholar
Seidman, D.N.: Three-dimensional atom-probe tomography: Advances and applications. Annu. Rev. Mater. Res. 37, 127–158 (2007).Google Scholar
Miller, M.K., Cerezo, A., Hetherington, M.G., and Smith, G.D.W.: Atom Probe Field Ion Microscopy (Oxford University Press, Oxford, 1996).Google Scholar
Marquis, E.A. and Vurpillot, F.: Chromatic aberrations in the field evaporation behavior of small precipitates. Microsc. Microanal. 14, 561–570 (2008).Google Scholar
Vo, N.Q., Chee, S.W., Schwen, D., Zhang, X.A., Bellon, P., and Averback, R.S.: Microstructural stability of nanostructured Cu alloys during high-temperature irradiation. Scr. Mater. 63, 929–932 (2010).Google Scholar
Vurpillot, F., Bostel, A., and Blavette, D.: Trajectory overlaps and local magnification in three-dimensional atom probe. Appl. Phys. Lett. 76, 3127–3129 (2000).Google Scholar
De Geuser, F., Lefebvre, W., Danoix, F., Vurpillot, F., Forbord, B., and Blavette, D.: An improved reconstruction procedure for the correction of local magnification effects in three-dimensional atom-probe. Surf. Interface Anal. 39, 268–272 (2007).Google Scholar
Hellman, O.C., Vandenbroucke, J.A., Rüsing, J., Isheim, D., and Seidman, D.N.: Analysis of three-dimensional atom-probe data by the proximity histogram. Microsc. Microanal. 6, 437–444 (2000).Google Scholar
Enrique, R.A. and Bellon, P.: Nonequilibrium fluctuations, effective temperature, and effective interactions driven by irradiation of alloys. Phys. Rev. B 70, 224106 (2004).CrossRefGoogle Scholar
Russell, K.C.: Phase stability under irradiation. Prog. Mater. Sci. 28, 229–434 (1984).Google Scholar
Sizmann, R.: The effect of radiation upon diffusion in metals. J. Nucl. Mater. 69–70, 386–412 (1978).Google Scholar
Tai, K., Averback, R.S., Bellon, P., Ashkenazy, Y., and Stumphy, B.: Temperature dependence of irradiation-induced creep in dilute nanostructured Cu-W alloys. J. Nucl. Mater. 422, 8–13 (2012).Google Scholar