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Hardness evolution of Al–Cr–N coatings under thermal load

Published online by Cambridge University Press:  31 January 2011

Herbert Willmann ,
Paul H. Mayrhofer ,
Lars Hultman  and
Christian Mitterer
Herbert Willmann
Affiliation:
Materials Center Leoben, 8700 Leoben, Austria; and Thin Film Physics Division, Department of Physics (IFM), Linköping University, 58183 Linköping, Sweden
Paul H. Mayrhofer*
Affiliation:
Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, 8700 Leoben, Austria
Lars Hultman
Affiliation:
Thin Film Physics Division, Department of Physics (IFM), Linköping University, 58183 Linköping, Sweden
Christian Mitterer
Affiliation:
Christian Doppler Laboratory for Advanced Hard Coatings at the Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, 8700 Leoben, Austria
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Microstructure and hardness evolution of arc-evaporated single-phase cubic Al0.56Cr0.44N and Al0.68Cr0.32N coatings have been investigated after thermal treatment in Ar atmosphere. Based on a combination of differential scanning calorimetry and x-ray diffraction studies, we can conclude that Al0.56Cr0.44N undergoes only small structural changes without any decomposition for annealing temperatures Ta ⩽ 900 °C. Consequently, the hardness decreases only marginally from the as-deposited value of 30.0 ± 1.1 GPa to 29.4 ± 0.9 GPa with Ta increasing to 900 °C, respectively. The film with higher Al content (Al0.68Cr0.32N) exhibits formation of hexagonal (h) AlN at Ta ⩾ 700 °C, which occurs preferably at grain boundaries as identified by analytical transmission electron microscopy. Hence, the hardness increases from the as-deposited value of 30.1 ± 1.3 GPa to 31.6 ± 1.4 GPa with Ta = 725 °C. At higher temperatures, where the size and volume fraction of the h-AlN phase increases, the hardness decreases to 27.5 ± 1.0 GPa with Ta = 900 °C.

Keywords

CoatingHardnessPhysical vapor deposition (PVD)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 11 , November 2008 , pp. 2880 - 2885
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1Vetter, J., Lugscheider, E., Guerreiro, S.S.: (Cr:Al)N coatings deposited by the cathodic vacuum arc evaporation. Surf. Coat. Technol. 98, 1233 1998CrossRefGoogle Scholar
2Ding, X.Z., Zeng, X.T.: Structural, mechanical and tribological properties of CrAlN coatings deposited by reactive unbalanced magnetron sputtering. Surf. Coat. Technol. 200, 1372 2005CrossRefGoogle Scholar
3Ide, Y., Nakamura, T., Kishitake, K.: Second International Conference on Processing Materials for Properties, edited by B. Mishra and C. Yamauchi The Minerals, Metals & Materials Society, San Francisco, CA 2000 291Google Scholar
4Hirai, M., Ueno, Y., Suzuki, T., Jiang, W.H., Grigoriu, C., Yatsui, K.: Characteristics of (Cr1−x, Alx)N films prepared by pulsed laser deposition. Jpn. J. Appl. Phys., Part 1 40, 1056 2001CrossRefGoogle Scholar
5Reiter, A.E., Derflinger, V.H., Hanselmann, B., Bachmann, T., Sartory, B.: Investigation of the properties of Al1−xCrxN coatings prepared by cathodic arc evaporation. Surf. Coat. Technol. 200, 2114 2005CrossRefGoogle Scholar
6Kawate, M., Kimura, A., Suzuki, T.: Microhardness and lattice parameter of Cr1−xAlxN films. J. Vac. Sci. Technol., A 20, 569 2002CrossRefGoogle Scholar
7Hasegawa, H., Suzuki, T.: Effects of second metal contents on microstructure and micro-hardness of ternary nitride films synthesized by cathodic arc method. Surf. Coat. Technol. 188, 234 2004CrossRefGoogle Scholar
8Kalss, W., Reiter, A., Derflinger, V., Gey, C., Endrino, J.L.: Modern coatings in high performance cutting applications. Int. J. Refract. Met. Hard Mater. 24, 399 2006CrossRefGoogle Scholar
9Banakh, O., Schmid, P.E., Sanjinés, R., Lévy, F.: High-temperature oxidation resistance of Cr1−xAlxN thin films deposited by reactive magnetron sputtering. Surf. Coat. Technol. 163, 57 2003CrossRefGoogle Scholar
10Kawate, M., Hashimoto, A.K., Suzuki, T.: Oxidation resistance of Cr1−XAlXN and Ti1−XAlXN films. Surf. Coat. Technol. 165, 163 2003CrossRefGoogle Scholar
11Mayrhofer, P.H., Mitterer, C., Hultman, L., Clemens, H.: Microstructural design of hard coatings. Prog. Mater. Sci. 51, 1032 2006CrossRefGoogle Scholar
12Hultman, L.: Thermal stability of nitride thin films. Vacuum 57, 1 2000CrossRefGoogle Scholar
13Sugishima, A., Kajioka, H., Makino, Y.: Phase transition of pseudobinary Cr–Al–N films deposited by magnetron sputtering method. Surf. Coat. Technol. 97, 590 1997CrossRefGoogle Scholar
14Makino, Y., Nogi, K.: Synthesis of pseudobinary Cr–Al–N films with B1 structure by rf-assisted magnetron sputtering method. Surf. Coat. Technol. 98, 1008 1998CrossRefGoogle Scholar
15Kimura, A., Kawate, M., Hasegawa, H., Suzuki, T.: Anisotropic lattice expansion and shrinkage of hexagonal TiAlN and CrAlN films. Surf. Coat. Technol. 169, 367 2003CrossRefGoogle Scholar
16Mayrhofer, P.H., Willmann, H., Reiter, A.: Structure and phase evolution of Cr–Al–N coatings during annealing. Surf. Coat. Technol. 202, 4935 2008CrossRefGoogle Scholar
17Mayrhofer, P.H., Music, D., Reeswinkel, Th., Fuß, H-G., Schneider, J.M.: Structure, elastic properties and phase stability of Cr1−xAlxN. Acta Mater. 56, 2469 2008CrossRefGoogle Scholar
18Zhang, R.F., Veprek, S.: Phase stabilities and spinodal decomposition in the Cr1−xAlxN system studied by ab initio LDA and thermodynamic modeling: Comparison with the Ti1−xAlxN and TiN/Si3N4 systems. Acta Mater. 55, 4615 2007CrossRefGoogle Scholar
19Willmann, H., Mayrhofer, P.H., Persson, P.O.Å., Reiter, A.E., Hultman, L., Mitterer, C.: Thermal stability of Al−Cr−N hard coatings. Scr. Mater. 54, 1847 2006CrossRefGoogle Scholar
20Mayrhofer, P.H., Hörling, A., Karlsson, L., Sjolén, J., Larsson, T., Mitterer, C., Hultman, L.: Self-organized nanostructures in the Ti–Al–N system. Appl. Phys. Lett. 83, 2049 2003CrossRefGoogle Scholar
21Mayrhofer, P.H., Stoiber, M., Mitterer, C.: Age hardening of PACVD TiBN thin films. Scr. Mater. 53, 241 2005CrossRefGoogle Scholar
22Argon, A.S., Yip, S.: The strongest size. Philos. Mag. Lett. 86, 713 2006CrossRefGoogle Scholar
23Mayer, M.: Simnra User’s Guide,, Max-Planck-Institut für Plasmaphysik, Technical Report 9 1997 113Google Scholar
24Zhang, Y.W., Whitlow, H.J., Winzell, T., Bubb, I.F., Sajavaara, T., Arstila, K., Keinonen, J.: Detection efficiency of time-of-flight energy elastic recoil detection analysis systems. Nucl. Instrum. Methods Phys. Res., Sect. B 149, 477 1999CrossRefGoogle Scholar
25Janson, M.S.: CONTES Instruction Manual, Internal Report Uppsala University, Sweden 2004Google Scholar
26Oliver, W.C., Pharr, G.M.: Improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7, 1564 1992CrossRefGoogle Scholar
27Greenwood, N.N., Earnshaw, A.: Chemistry of the Elements, 2nd ed.Butterworth-Heinemann, Oxford 1997Google Scholar
28Mayrhofer, P.H., Willmann, H., Hultman, L., Mitterer, C.: Influence of different atmospheres on the thermal decomposition of Al–Cr–N coatings. J. Phys. D: Appl. Phys. 41, 155316 2008CrossRefGoogle Scholar
29JCPDS No. 25-1133 (h-AlN). International Center for Diffraction Data Swarthmore, CA 2001Google Scholar