Abstract
This research is devoted on the investigation of effect of SPS (spark plasma sintering) by comparing with the conventional sintering on the mullite-ZrO2 ceramics development. Mullite-ZrO2 ceramics was produced from different time ball-milled powders. The effect of illite nanoparticles to one part of powder was investigated to promote the sintering process. The density and compressive strength as well as microstructure and crystalline phase development of ceramics were used to show the impact of SPS by comparing with conventional sintering. It was shown that sintered at 12500C by SPS samples achieved densities for up to 1.6-2.2 times times higher as by conventional sintering at 13000C. Together the compressive strength and Vicker's microhardness correlate with the changing of density. The microstructure of the SPS samples is dense and is formed from good textured mullite and cubic ZrO2 particles, but by conventionally sintered – there are formed mullite-corundum crystals with inclusion of tetragonal ZrO2. illite clay additive is effective on density and compressive strength increase only for conventionally sintered samples, but not for SPS. DOI: http://dx.doi.org/10.5755/j01.ms.21.1.5501
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