Depth Sensing Indentation of Oxidized Plasma Sprayed CoNiCrAlY Coatings

Instrumented spherical micro-indentation of plasma-sprayed coatings

The mechanical response of plasma-sprayed coatings is studied by recourse to instrumented spherical micro-indentation. It is shown that the elastic moduli of the coatings can be determined in a more reliable and reproducible manner with instrumented spherical indentation than prior (Knoop) indentation methods, while at the same time minimizing damage to the coating during indentation. The resul...

Depth - sensing instrumented indentation with dual sharp

57 A methodology for interpreting instrumented sharp indentation with dual sharp indenters with different tip apex 58 angles is presented by recourse to computational modeling within the context of finite element analysis. The forward 59 problem predicts an indentation response from a given set of elasto-plastic properties, whereas the reverse analysis 60 seeks to extract elasto-plastic propert...

Microstructure and Properties of Plasma Sprayed Nanostructural ZrO2 Coatings

Plasma sprayed zirconia deposits have been employed in wide applications for thermal protection. Recently, the use of nanostructural surface represents an alternative for improving the performance of these coatings. The present paper reviewed the works in this field at our research group, including synthesis of nanostructural ZrO2 powders, influence of spraying parameters on microstructure and ...

Failure analysis of suspension plasma sprayed thermal barrier coatings

Sintering of Fine Particles in Suspension Plasma Sprayed Coatings

Suspension plasma spraying is a process that enables the production of finely grained nanometric or submicrometric coatings. The suspensions are formulated with the use of fine powder particles in water or alcohol with some additives. Subsequently, the suspension is injected into plasma jet and the liquid additives evaporate. The remaining fine solids are molten and subsequently agglomerate or ...