Improving Ag-DLC Film Adherence on High-Speed Steel by Varying Ag Contents in A Mid-Frequency Dual-Magnetron Sputtering

Abstract:

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Aiming at improving their tribological behaviors, adhesion of diamond-like carbon (DLC) films on high-speed steel was investigated by varying doping silver (Ag) contents in a mid-frequency dual-magnetron sputtering system. Scratch testing was performed on the Ag-DLC films under a progressive normal load from 3 to 80 N, along with a Rockwell C indenter at a relative displacement speed for a Rockwell testing. A microscopic analysis of the scratch evolution under a progressive normal load permits identification of the various traces and the damage mechanisms of the films. A process of the film adhesion failure typically in turn appears like this, germination of the cracks along the longitudinal edges of the scratch traces; propagation in front of the indenter; and, detachment in the subsurface by shearing. An Ag-DLC film of 15.2 at% Ag exhibits a superior adherence on the steel substrate as compared with the three Ag DLC films of the other doping silver contents.

Info:

Periodical:

Key Engineering Materials (Volumes 434-435)

Edited by:

Wei Pan and Jianghong Gong

Pages:

462-465

DOI:

10.4028/www.scientific.net/KEM.434-435.462

Citation:

X. Yu et al., "Improving Ag-DLC Film Adherence on High-Speed Steel by Varying Ag Contents in A Mid-Frequency Dual-Magnetron Sputtering", Key Engineering Materials, Vols. 434-435, pp. 462-465, 2010

Online since:

March 2010

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Price:

$35.00

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