Experimental study of wear-induced delamination for DLC coated automotive components

被引:22
作者
Choleridis, Antonios [1 ]
Sao-Joao, Sergio [1 ]
Ben-Mohamed, Jihane [1 ]
Chern, David [1 ]
Barnier, Vincent [1 ]
Kermouche, Guillaume [1 ]
Heau, Christophe [3 ]
Leroy, Marie-Alix [3 ]
Fontaine, Julien [4 ]
Descartes, Sylvie [5 ]
Donnet, Christophe [2 ]
Klocker, Helmut [1 ]
机构
[1] Univ Lyon, UMR LGF 5307, CNRS, Mines St Etienne,Ctr SMS, F-42023 St Etienne, France
[2] Univ Lyon, Univ Jean Monnet, Lab Hubert Curien UMR CNRS 5516, F-42000 St Etienne, France
[3] Inst Rech Ingn Surfaces, Grp HEF, Andrezieux Boutheon, France
[4] Univ Lyon, Lab Tribol & Dynam Systemes, UMR 5513, Ecole Cent Lyon, F-69130 Ecully, France
[5] Univ Lyon, Lab Mecan Contacts & Struct, INSA Lyon, UMR 5259, F-69100 Villeurbanne, France
关键词
Diamond-Like Carbon coating; Delamination; In situ; Wear; Experimental characterization; Focused ion beam; Atomic force microscopy; Energy-dispersive X-ray spectroscopy; PROGRESSIVELY DEPOSITED COATINGS; PREDICTING RESIDUAL-STRESSES; SCRATCH ADHESION TEST; INTERFACE CRACK; FILM DELAMINATIONS; DISSIMILAR MEDIA; ANALYTICAL-MODEL; SHEAR FIELD; THIN-FILMS; ENERGY;
D O I
10.1016/j.surfcoat.2018.08.048
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The trends in automotive industry are towards higher performance, improved reliability, reduced tolerances and more environmental friendly products. Wear resistance enhanced mechanical components exhibiting lower friction help achieving this major challenge. Diamond-Like Carbon (DLC) deposited on mechanical components operating under lubricated conditions at temperatures between 100 and 250 degrees C, efficiently decrease the friction coefficient and insure wear protection. Wear induced debonding and blistering of hard surface coatings is still a major problem in the automotive industry. There are several open questions. Where does debonding start? Where does the interface crack propagate? Where does it deviate leading to delamination? In this work, we show how the combination of the latest experimental techniques allows to answer these questions and thus better control wear. Blistering is influenced by the overall stress in the coating and the very local microstructure of the substrate. A combination of AFM and nano-indentation measurements, as well as FIB milling with in situ FEG-SEM observations and local chemical measurements by EDX, allows to observe closely and better understand wear-induced delamination. The new availability of such physical and chemical investigations should improve mechanical and physical-based models to predict wear and enhance coating adhesion.
引用
收藏
页码:549 / 560
页数:12
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