Abstract
The paper describes comparative nanoindentation tests of an HfB2 single crystal and an HfB2.7 nanocrystalline thin film deposited on a steel substrate by magnetron sputtering. The boron superstoichiometry and small grain size are shown to result in a significant increase in hardness and decrease of elastic modulus of the thin HfB2.7 film in comparison to the bulk single crystal. The abnormally high (for inorganic materials) value (87%) of elastic recovery of the impression depth in the thin HfB2.7 film upon the indenter unloading suggests that the film can be considered as a promising wear-resistant coating.
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Fahrenholtz, W.G., Hilmas, G.E., Talmy Inna G., Zaykoski, J.A., Refractory Diborides of Zirconium and Hafnium, J. Am. Ceram. Soc., 2007, vol. 90, no. 5, pp. 1347–1364.
Jayaraman, S., Gerbi, J.E., Yang, Y., et al., HfB2 and Hf-B-N Hard Coatings by Chemical Vapor Deposition, Surf. Coat. Technol., 2006, vol. 200, nos. 22–23, pp. 6629–6633.
Oliver, W.C., Pharr, G.M., An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation Experiments, J. Mater. Res., 1992, vol. 7, no. 6, pp. 1564–1583.
Lorenz, D., Zeckzer, A., Hilpert, U., et al., Pop-in Effect as Homogeneous Nucleation of Dislocations During Nanoindentation, Phys. Rev. B, 2003, vol. 67, no. 17, p. 172101.
Dub, S.N., Brazhkin, V.V., Novikov, N.V., et al., Comparative Studies of Mechanical Properties of Stishovite and Sapphire Single Crystals by Nanoindentation, Sverkhtverdye Materialy, 2010, no. 6, pp. 55–67 [J. Superhard Mater., 2010, no. 6].
Johnson, K.L., Contact Mechanics, Cambridge University Press, 1987.
Kelly, A., Vysokoprochnye materialy, Moscow: Mir, 1976.
Dub, S.N., Lim, Y.Y., and Chaudhri, M.M., Nanohardness of High Purity Cu (111) Single Crystals: The Effect of Indenter Load and Prior Plastic Sample Strain, J. Appl. Phys., 2010, vol. 107, p. 043510.
Lee, E.H., Lee, Y., Oliver, W.S., Mansur, L.K., Hardness Measurements of Ar+-Beam Treated Polyimide by Depth-Sensing Ultralow Load Indentation, J. Mater. Res., 1993, vol. 8, no. 2, pp. 377–387.
Veprek, S. and Argon, A., Mechanical Properties of Superhard Nanocomposites, Surf. Coat. Technol., 2001, vol. 146–147, pp. 175–182.
Novikov, N.V., Voronkin, M.A., Dub, S.N., et al., Transition from Polymer-like to Diamond-like a-C:H Films: Structure and Mechanical Properties, Diamond Relat. Mater., 1997, vol. 6, nos. 5–7, pp. 574–578.
Brazhkin, V.V., Solozhenko, V.L., Dub, S.N., et al., Bulk Nanostructured Carbon Phases Prepared from C60: Approaching the’ Ideal’ Hardness, J. Phys.: Condens. Matter, 2007, vol. 19, p. 236209.
Rabinowicz, E., Friction and Wear of Materials, New York: Wiley, 1995.
Leyland, A. and Matthews, A., On the Significance of the H/E Ratio in Wear Control: a Nanocomposite Coating Approach to Optimised Tribological Behaviour, Wear, 2000, vol. 246, pp. 1–11.
Chatterjee, A., Kumara, N., Abelson, J.R., et al., Nanoscratch and Nanofriction Behavior of Hafnium Diboride Thin Films, Wear, 2008, vol. 265, pp. 921–929.
Firstov, S.A. and Rogul’, T.G., Theoretical (Ultimate) Hardness, Dopovidi NAN Ukrainy, 2007, no. 4, pp. 110–114.
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Original Russian Text © S.N. Dub, A.A. Goncharov, S.S. Ponomarev, V.B. Filippov, G.N. Tolmacheva, A.V. Agulov, 2011, published in Sverkhtverdye Materialy, 2011, Vol. 33, No. 3, pp. 9–19.
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Dub, S.N., Goncharov, A.A., Ponomarev, S.S. et al. Mechanical properties of HfB2.7 nanocrystalline thin films. J. Superhard Mater. 33, 151–158 (2011). https://doi.org/10.3103/S1063457611030026
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DOI: https://doi.org/10.3103/S1063457611030026