Title :

Vickers Indentation Fracture (VIF) modeling to analyze multi-cracking toughness of titania, alumina and zirconia plasma sprayed coatings

Author(s) :

Chicot, Didier [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Duarte, G. [Auteur]
Tricoteaux, A [Auteur]
Jorgowski, Benoît [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
Leriche, Anne [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
Lesage, J. [Auteur]

Journal title :

Materials Science and Engineering: A

Pages :

65-76

Publisher :

Elsevier

Publication date :

2009-12

ISSN :

0921-5093

English keyword(s) :

Al2O3
TiO2
ZrO2
Hardness
Toughness and toughening
Surfaces

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

For massive brittle materials, the fracture toughness in mode I, KIC, can be determined using various reliable techniques. Besides, Vickers Indentation Fracture (VIF) technique has been developed to locally determine ...
Show more >For massive brittle materials, the fracture toughness in mode I, KIC, can be determined using various reliable techniques. Besides, Vickers Indentation Fracture (VIF) technique has been developed to locally determine fracture toughness. However, since the indentation test generates a complex three-dimensional crack system around the indent, fracture toughness, KC, is calculated instead of KIC. Consequently some authors rightly reject the VIF technique to determine standard fracture toughness by arguing that the literature counts numerous VIF crack equations thus revealing discrepancies of this technique. Nevertheless in some cases (e.g. brittle ceramic coatings) inclusive material techniques are not applicable since presence of the substrate and/or multi-crack network can modify the crack propagation into the coating.In this work, we employed VIF technique to study multi-cracking behavior of titania, alumina and zirconia ceramic oxide coatings obtained by plasma spraying. To calculate VIF toughness, we propose (i) to select two crack equations for radial-median and Palmqvist cracking modes respectively, (ii) to adjust the crack equation of Miranzo and Moya for intermediate cracking mode, (iii) to develop a mathematical approach to determine the cracking mode, (iv) to take into account the multi-crack network by defining an equivalent four-crack system and (v) to propose a universal crack equation applicable independently of the cracking mode.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Source :

Harvested from HAL

Submission date :

2025-02-26T10:45:16Z