Finite element and experimental analysis of Vickers indentation testing on Al2O3 with diamond-like carbon coating

Autor:	Jian-guang Zhai, Tae Gyu Kim, Yi-qi Wang, Jung-Il Song
Rok vydání:	2012
Předmět:	Materials science Diamond-like carbon Metals and Alloys General Engineering engineering.material Finite element method Brittleness Fracture toughness Coating visual_art Vickers hardness test engineering Fracture (geology) visual_art.visual_art_medium Ceramic Composite material
Zdroj:	Journal of Central South University. 19:1175-1181
ISSN:	2227-5223 2095-2899
Popis:	Numerical simulation and experimental study of the Vickers indentation testing of the Al2O3 ceramic coated by diamond-like carbon (DLC) layer were conducted. The numerical analysis was implemented by a two-dimensional finite element (FE) axis symmetry model. FE analysis results gave insight into the fracture mechanism of DLC films coated on brittle ceramic (Al2O3) substrates. The maximum principal stress field was used to locate the most expected area for crack formation and propagation during the Vickers indentation testing. The results show that the median crack initiates in the interface under indenter, before ring crack occurs as the indenter presses down. Finally, the plastic deformation appears when the indenter penetrates into the substrate. The thicker DLC coating increases the Vickers hardness and fracture toughness.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d939b6d50d4aa531c2f3af22e03e2ca https://doi.org/10.1007/s11771-012-1125-z Zobrazit plný text záznamu Full text from SpringerLink