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Characterization of Magnetron Assisted Pulsed Laser Deposited ZrO2-Au Composite Films Using TEM and EDS

Published online by Cambridge University Press:  02 July 2020

J.J. Hu ,
A.A. Voevodin  and
J.S. Zabinski
J.J. Hu
Affiliation:
Materials and Manufacturing Directorate, AFRL / MLBT, Wright-Patterson AFB, OH45433-7750
A.A. Voevodin
Affiliation:
Materials and Manufacturing Directorate, AFRL / MLBT, Wright-Patterson AFB, OH45433-7750
J.S. Zabinski
Affiliation:
Materials and Manufacturing Directorate, AFRL / MLBT, Wright-Patterson AFB, OH45433-7750
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Abstract

Microstructurally engineered oxide coatings have good potential as lubricants for aerospace applications over a wide range of environmental conditions1. Using composite microstructures, wear rates and friction coefficients may be reduced compared to monolithic coatings. Here, we report the characterization of ZrO2-Au composite coatings as new candidate lubricants. Au is added to ZrO2 to reduce friction and improve toughness. The composite films were grown on steel and silicon disks at room temperature (RT) by pulsed laser ablation of a ZrO2/5 wt. % Y2O3 target, with simultaneous operation of a magnetron source to add Au. The laser beam was operated at 250mJ, 40 Hz, and the magnetron was operated at 1.5-3.5 W cm-2 in 2.7 Pa argon. Varying the magnetron power produced coatings with different concentrations of Au. The coatings were prepared for transmission electron microscope (TEM) analysis by tripod polishing and ion milling on a cold stage.

Type
Thin Films & Coatings
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1232 - 1233
Copyright
Copyright © Microscopy Society of America 2001

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References

References:

1.Zabinski, J.S., Sanders, J.H., Nainaparampil, J., and Prasad, S.V., Tribology Letters, 8 (2000) 103.CrossRefGoogle Scholar
2.Sohn, J.R., Cho, S.G., Pae, Y., and Hayashi, S., Journal of Catalysis, 159 (1996) 170.CrossRefGoogle Scholar
3.Voevodin, A. A., Hu, J. J., Fitz, T. A., Zabinski, J. S., Surf. Coat. Technol., to be submitted (2001).Google Scholar