Exploring Film Failure Mechanism and Scratch Toughness Characterization of Diamond-Like Carbon Film

DOI

10.2991/cmfe-15.2015.71How to use a DOI?

Keywords

diamond-like carbon (DLC) film; toughness characterization; scratch test; failure mechanism; stress aspect

Abstract

Diamond-like carbon (DLC) film has drawn an intensive concern, but suffers from its poor toughness. Characterization method for the film toughness is not available to date, which hampers the researches for toughening DLC films. This work attempts to reveal the scratch failure mechanism from stress aspects, and then allows for a characterization method to determine the toughness with accuracy. Results show that, (a) failure process of the DLC film under increasing load during scratch duration can be divided into three stages: (I) circular cracks occurred on the upper surface; (II) radial cracks formed in the lower surface; and (III) lateral cracks appeared in the film due to crack converging, leading to delamination and spalling of the film. (b) Scratch morphology allows for a qualitative characterization; as for the film toughness unavailable from the scratch morphology, the value of Scratch Crack Propagation Resistance (CPRS) can quantitatively characterize the film toughness.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yonghui Wang
AU  - Xiang Yu
PY  - 2015/07
DA  - 2015/07
TI  - Exploring Film Failure Mechanism and Scratch Toughness Characterization of Diamond-Like Carbon Film
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 298
EP  - 301
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.71
DO  - 10.2991/cmfe-15.2015.71
ID  - Wang2015/07
ER  -