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Phase Formation and Mechanical Properties of Multiphase Carbide Coatings

Published online by Cambridge University Press:  10 February 2011

J. E. Krzanowski ,
S. H. Koutzaki ,
J. Nainaparampil  and
J. S. Zabinski
J. E. Krzanowski
Affiliation:
Mechanical Engineering Department, University of New Hampshire, Durham, NH 03824
S. H. Koutzaki
Affiliation:
Mechanical Engineering Department, University of New Hampshire, Durham, NH 03824
J. Nainaparampil
Affiliation:
Systran Corp., Dayton, OH 45432
J. S. Zabinski
Affiliation:
Wright Laboratories/Materials Directorate, Wright-Patterson AFB, Dayton OH, 45433
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Abstract

We have investigated nano-structured multiphase coatings consisting of mixed carbide components. Two ternary carbide systems, Ti-Mo-C and Ti-Si-C, were examined. Coatings were fabricated by co-sputtering from carbide targets, thereby allowing a complete range of film compositions to be obtained in each system. Films were deposited on Si and sapphire substrates at temperatures ranging from room temperature to 650°C. Film compositions were determined using XPS, and x-ray diffraction and TEM analysis were used to examine the films for texture, grain size, phase stability and the potential for creating nano-structured multiphase films. Mo was found to be soluble in TiC up to about 80% Mo, and between 85–95% Mo a multiphase structure was obtained. The hardness of these films generally did not improve due to the Mo additions. For the Ti-Si-C films, X-ray diffraction results were consistent with the formation of cubic SiC and TiC phases. In these films, the hardness was found to improve with SiC additions optimally giving hardness values of about twice that of TiC alone.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 594: Symposium V – Thin Films - Stresses & Mechanical Properties VIII , 1999 , 181
Copyright
Copyright © Materials Research Society 2000

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References

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