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Mechanical Properties of Pure Carbon and Carbonnitrogen Coatings on Thin Film Head Sliders

Published online by Cambridge University Press:  15 February 2011

G. Wang ,
A. Strojny ,
J. M. Sivertsen ,
J. H. Judy  and
W. W. Gerberich
G. Wang
Affiliation:
Department of Chemical Engineering and Materials Science
A. Strojny
Affiliation:
Department of Chemical Engineering and Materials Science
J. M. Sivertsen
Affiliation:
Department of Chemical Engineering and Materials Science
J. H. Judy
Affiliation:
Department of Electrical Engineering University of Minnesota, Minneapolis, MN 55455
W. W. Gerberich
Affiliation:
Department of Chemical Engineering and Materials Science
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Abstract

The mechanical properties of pure carbon (C) and carbon-nitrogen (C:N) coatings on thin film head sliders were investigated by continuous drag testing (CDT) and nano-indentation. Comparisons were made in terms of wear protection, elastic modulus and hardness of these two types of carbon films. The C and C:N thin films with various thickness were deposited on thin film head sliders using a facing target sputtering (FTS) system. After 23,000 revolutions of CDT tests, all the testing head sliders which were uncoated and coated with 90 Å C or C:N exhibited some degree of wear damage as indicated in AFM micrographs where that of the uncoated head was the most severe and that of the C:N coated head was the least. Head sliders coated with 1000Å C and C:N were studied under the TriboscopeTM nano-indenter, where load-displacement curves at different maximum loads were recorded. Elastic modulus and hardness were determined from those curves. The results show that elastic modulus and hardness of C:N are greater than that of C. Therefore, one may conclude that both C and C:N behave like a protective coating for the head slider where C:N is better than C, which could be well related to the larger elastic modulus and hardness of C:N.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 436: Symposium CC – Thin Films Stresses and Mechanical Properties VI , 1996 , 345
Copyright
Copyright © Materials Research Society 1997

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