Electrophoretic deposition and its use to synthesize ZrO2/Al2O3 micro-laminate ceramic/ceramic composites

Abstract

Electrophoretic deposition has been employed to synthesize yttria-stabilized zirconia (YSZ)/alumina, laminar microcomposites with a total of 80 layers, > 2 mm. 10 wt% solids, ethanol suspensions of YSZ or AI203 powders were deposited layer by layer. The deposited samples had a green density, ~ 60% theoretical. The deposition process was characterized by the rate-of-deposition as a function of voltage and the microstructure of the sintered, theoretically dense samples was characterized by optical and electron microscopy. Microindentation was used to explore the mechanical properties of the laminates.

Characterization of the yttria-stabilized zirconia thin film electrophoretic deposited on La0.8Sr0.2MnO3 substrate

“…After 300 s deposition, the current density begins to decrease slowly and finally reach saturation. This phenomenon is mainly due to the building up of an insulating YSZ layer as deposition continues [22], creating a greater resistance than Ohmic resistance, and a nonlinear part of the deposit versus voltage curve in Fig. 4.…”

Processing optimisation and fracture behaviour of layered ceramic composites with highly compressive layers

“…In this regard, colloidal processing methods have proved to be useful to tailor the mentioned variables aiming to manufacture reliable laminated structures. Those methods include tape-casting [22][23][24], centrifugal casting [25,26], sequential slip casting [27] and electrophoretic deposition (EPD) [28,29] among others. All these approaches are based on the preparation of stable slurries with specific compositions that are piled up by adding a layer to a previously formed one.…”

Processing of Al2O3/Y-TZP laminates from water-based cast tapes

“…These methods have the advantages that allow to strictly control the composition and, depending on the technique, the thickness of the layers. The colloidal processing techniques described for the fabrication of laminated ceramic include tape-casting [6,11,18,24], centrifugal casting [26,27], sequential slipcasting [17,[28][29][30], electrophoretic deposition (EPD) [31,32], and others (e.g. [33][34][35]).…”