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Evaluation of the mechanical properties of plasma-sprayed coating by nanoindentation technology

Published online by Cambridge University Press:  16 November 2012

Wei-Chao Guo ,
Gast Rauchs ,
Luc Papeleux ,
Wei-Hong Zhang ,
François Gitzhofer  and
Jean-Philippe Ponthot
Wei-Chao Guo
Affiliation:
LTAS/MN2L, Aerospace & Mechanical Engineering Department, University of Liège, 4000 Liège, Belgium Engineering Simulation and Aerospace Computing, the Key Laboratory of Contemporary Design & Integrated Manufacturing Technology, Northwestern Polytechnical University, Xi’an, 710072 Shaanxi, China
Gast Rauchs
Affiliation:
Department of Advanced Materials and Structures, Centre de Recherche Public Henri Tudor, 4221 Esch-sur-Alzette, Luxembourg
Luc Papeleux
Affiliation:
LTAS/MN2L, Aerospace & Mechanical Engineering Department, University of Liège, 4000 Liège, Belgium
Wei-Hong Zhang
Affiliation:
Engineering Simulation and Aerospace Computing, the Key Laboratory of Contemporary Design & Integrated Manufacturing Technology, Northwestern Polytechnical University, Xi’an, 710072 Shaanxi, China
François Gitzhofer
Affiliation:
Plasma Technology Research Center (CRTP), Department of Chemical Engineering, University of Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
Jean-Philippe Ponthot*
Affiliation:
LTAS/MN2L, Aerospace & Mechanical Engineering Department, University of Liège, 4000 Liège, Belgium
*
a Corresponding author: JP.Ponthot@ulg.ac.be
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Abstract

In this paper, the mechanical properties of plasma-sprayed coatings are evaluated using the technology of nanoindentation. According to the indentation curve (load versus indenter’s displacement), which is recorded in an indentation experiment, the mechanical behaviour of the plasma-sprayed coating is investigated via inverse analysis using numerical optimization algorithms. The tip rounding of imperfect indenter is investigated in parameter identification. Subsequently, the hardness on the top surface and on the vertical cross section of the plasma-sprayed coating are investigated. The results show that the hardness on the top surface of the coating depends on the indentation depth. Moreover, the results show that the hardness on the cross section of the coating is significantly affected by the substrate if the indentation impression is too close to the coating-substrate interface.

Keywords

Nanoindentationhardnessplasma-sprayed coatinginverse analysisnumerical method
Type
Research Article
Information
Mechanics & Industry , Volume 13 , Issue 3 , 2012 , pp. 151 - 162
Copyright
© AFM, EDP Sciences 2012

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