Abstract
Efforts have been made to deposit alumina-40 wt.% titania (AT-40) coatings AISI 1045 steel by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique. The structure, morphology and chemical composition fracture mechanisms of the coatings was studied by XRD, SEM and EDAX, The coating contain alumina and titania. The alumina has γ-Al₂O₃, θ-Al₂O₃ and α-Al₂O₃ and titania comprise of rutile and anatase phases. Vickers-indentation was used to determine the hardness and fracture toughness of coated materials. The hardness values varied with the indentation load. Experimental results indicate that Vickers hardness varied from 13.3 to 17.0 GPa. The fracture toughness obtained from Vickers indentation was in the order of 1.77-2.07 MPa. In addition the elastic-plastic behavior was evaluated by finite element (FE) numerical analysis. FE analysis results gave insight in the fracture mechanism of the ceramic films.
Translated title of the contribution | Mechanical Characterization of PECVD coated Materials by Indentation Techniques and Finite Element Simulation |
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Original language | Korean |
Pages (from-to) | 194-198 |
Number of pages | 5 |
Journal | Journal of the Korean Society of Mechanical Engineers |
Volume | 2012 |
Publication status | Published - May 2012 |
Event | 2012 Spring Conference of the Korean Society of Mechanical Engineers - , Korea, Republic of Duration: 12 May 2012 → 12 May 2012 https://www.dbpia.co.kr/journal/voisDetail?voisId=VOIS00104705 |
Keywords
- indentation
- finite element analysis
- PECVD
- fracture toughness
- indentation techniques
- finite element