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Accelerated thermal degradation of DLC-coatings via growth defects

Braak, R. ; May, U. ; Onuseit, L. ; Repphun, G. ; Guenther, M. ; Schmid, Christoph ; Durst, Karsten (2018)
Accelerated thermal degradation of DLC-coatings via growth defects.
In: Surface and Coatings Technology, 349
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. ; May, U. ; Onuseit, L. ; Repphun, G. ; Guenther, M. ; Schmid, Christoph ; Durst, Karsten
Type of entry: Bibliographie
Title: Accelerated thermal degradation of DLC-coatings via growth defects
Language: English
Date: 2018
Publisher: Elsevier
Journal or Publication Title: Surface and Coatings Technology
Volume of the journal: 349
DOI: 10.1016/j.surfcoat.2018.05.063
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.

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
Last Modified: 18 Jul 2018 14:06
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