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Accelerated thermal degradation of DLC-coatings via growth defects

Braak, R. and May, U. and Onuseit, L. and Repphun, G. and Guenther, M. and Schmid, Christoph and Durst, Karsten (2018):
Accelerated thermal degradation of DLC-coatings via growth defects.
In: Surface and Coatings Technology, Elsevier, pp. 272-278, 349, ISSN 0257-8972,
DOI: 10.1016/j.surfcoat.2018.05.063,
[Article]

Abstract

Diamond-like carbons (DLC) are frequently used as wear protection coatings for tribologically loaded steel parts in the automotive industry. Diverse interlayer concepts are applied to increase the coatings adhesion which is otherwise poor on blank steel. Our focus lies on the influence of the adhesion layer design on the thermo-chemical stability of a H-containing DLC-coating and the significant role of growth defects.

At the interfaces between individual layers or in more elaborated transition zones, several stability issues might arise under certain conditions: E.g. a thermally driven, intrinsic aging can lower the adhesion strength. With sufficiently low adhesion, stress corrosion cracking along the interface can occur, leading to delamination progression at subcritical loads.

Item Type: Article
Erschienen: 2018
Creators: Braak, R. and May, U. and Onuseit, L. and Repphun, G. and Guenther, M. and Schmid, Christoph and Durst, Karsten
Title: Accelerated thermal degradation of DLC-coatings via growth defects
Language: English
Abstract:

Diamond-like carbons (DLC) are frequently used as wear protection coatings for tribologically loaded steel parts in the automotive industry. Diverse interlayer concepts are applied to increase the coatings adhesion which is otherwise poor on blank steel. Our focus lies on the influence of the adhesion layer design on the thermo-chemical stability of a H-containing DLC-coating and the significant role of growth defects.

At the interfaces between individual layers or in more elaborated transition zones, several stability issues might arise under certain conditions: E.g. a thermally driven, intrinsic aging can lower the adhesion strength. With sufficiently low adhesion, stress corrosion cracking along the interface can occur, leading to delamination progression at subcritical loads.

Journal or Publication Title: Surface and Coatings Technology
Volume: 349
Publisher: Elsevier
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 18 Jul 2018 14:06
DOI: 10.1016/j.surfcoat.2018.05.063
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