Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-25T05:25:58.186Z Has data issue: false hasContentIssue false
  • English
  • Français

Sputtered Coatings Based on the Al2Au Phase

Published online by Cambridge University Press:  26 February 2011

Christian Mitterer ,
Helmut Lenhart ,
Paul H. Mayrhofer  and
Martin Kathrein
Christian Mitterer
Affiliation:
Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-JosefStrasse 18, A-8700 Leoben, Austria
Helmut Lenhart
Affiliation:
Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-JosefStrasse 18, A-8700 Leoben, Austria
Paul H. Mayrhofer
Affiliation:
Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-JosefStrasse 18, A-8700 Leoben, Austria
Martin Kathrein
Affiliation:
CERATIZIT Austria GmbH, A-6600 Reutte, Austria
Get access

Abstract

Transition metal nitride-based, wear-resistant hard coatings on cutting tools and other substrates often lack distinct colorations allowing product differentiation and self-lubricating properties. In the present work, the possibility of achieving these objectives for sputtered coatings based on the purple-red Al2Au phase within the Al-Au system was investigated. Coatings were characterized with respect to morphology, chemical and phase composition, hardness, optical, oxidation and tribological properties. Al2Au-containing coatings were deposited with dense, fine-grained structures yielding a hardness of 4 GPa and pink coloration. The coatings were stable up to about 850°C, where the onset of oxidation occurs. Low friction coefficients against alumina were achieved between 500 and 700°C. The concept of applying Al2Au-containing coatings as a colored self-lubricating layer on top of a hard coated cemented carbide tool warrants further investigations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S5.38
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. North, B., Surf. Coat. Technol. 106, 129 (1998).Google Scholar
2. Cahn, R. W., Nature 396, 523 (1998).Google Scholar
3. Shih, H. C., Z. Metallkde. 71, 577 (1980).Google Scholar
4. Hsu, L.-S., Guo, G.-Y., Denlinger, J. D., and Allen, J. W., J. Phys. Chem. Solids 62, 1047 (2001).Google Scholar
5. Eskner, M. and Sandström, R., Surf. Coat. Technol. 165, 71 (2003).Google Scholar
6. Xu, C., Breach, C. D., Shritharan, T., Wulff, F., and Mhaisalkar, S. G., Thin Solid Films 462–463, 357 (2004).Google Scholar
7. Losbichler, P. and Mitterer, C., Surf. Coat. Technol. 97, 568 (1997).Google Scholar
8. Thornton, J. A., J. Vac. Sci. Technol. 11, 666 (1974).Google Scholar
9. Raymond, T., Semicond. Int. 12, 152 (1989).Google Scholar
10. Mitterer, C., J. Solid State Chem. 133, 279 (1997).Google Scholar
11. de Waal, H. S., Pretorius, R., Prozesky, V. M., and Churms, C. L., Nucl. Instrum. Meth. B130, 722 (1997).Google Scholar
12. Mayrhofer, P. H., Willmann, H., and Mitterer, C., Surf. Coat. Technol. 146–147, 222 (2001).Google Scholar
13. Svensson, H., Angenete, J., and Stiller, K., Surf. Coat. Technol. 177–178, 152 (2004).Google Scholar
14. Kutschej, K., Mayrhofer, P. H., Kathrein, M., Polcik, P., Tessadri, R., and Mitterer, C., Surf. Coat. Technol., in press.Google Scholar