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Adhesion and Tribological Behavior of Si-DLC Coatings on Steel Processed by Ion Beam-Assisted Deposition

Published online by Cambridge University Press:  22 February 2011

C. G. Fountzoulas ,
T. Z. Kattamis  and
M. Chen
C. G. Fountzoulas
Affiliation:
U. S. Army Research Laboratory, Materials Directorate, Watertown, MA 02172-0001
T. Z. Kattamis
Affiliation:
Institute of Materials Science, University of Connecticut, Storτs, CT 06269-3136
M. Chen
Affiliation:
Institute of Materials Science, University of Connecticut, Storτs, CT 06269-3136
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Abstract

Amorphous silicon-containing diamond-like carbon (Si-DLC) films were processed by Ar+ ion beam-assisted deposition (IBAD) on AISI 4130, 17-7 PH, 440-C, and 4340 alloy steel specimens, as well as Cr-preplated and TiN-precoated-Cr-preplated 4340 steel specimens. Coating thicknesses ranging from 1.8 to 4.31 µm were obtained, and increased with increasing beam current density and appeared to depend on the composition of the steel substrate. Microhardness values were slightly lower for the coating on Cr-preplated 4340 steel (1,017 KHN) and substantially higher for the coating on TiN-precoated 4340 steel (1,825 KHN). The cohesion and adhesion failure loads increased with increasing coating thickness and underlying layer hardness. The adhesion failure load of the coating on TiN-precoated-Cr-preplated 4340 steel exceeded those on other substrates. The friction coefficient of the coating surface was lower for the Cr-preplated 4340 specimen and substantially lower for the TiN-precoated-Cr-preplated substrate. Wear resistance seemed to be practically the same for coated 4340 or 17-7 PH steel substrates (3.16 × 10-6 to 8.60 × 10-6 mm3 N-1m-1).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 316: Symposium A – Materials Synthesis and Processing Using Ion Beams , 1993 , 851
Copyright
Copyright © Materials Research Society 1994

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References

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