Microstructure Analysis of Fibrous Material Manufactured by Plasma Spray Method
Keywords:waste catalyst, plasma spraying, fibrous material, microstructure, crystallization
This paper presents an investigation of the fibrous material manufactured by plasma spray technique employing non-equilibrium plasma spray technology at atmospheric pressure. Waste catalyst of oil refinery and petrochemical industries was used as raw material for fibrous material production. The influence of the plasma spray regimes on microstructure of the formed material was analyzed. Annealing of the fibrous material was performed in the temperature range from 900 °C up to 1200 °C for study of crystallization process and each time the crystallite size of the material was calculated. Crystallization of the fibrous material with formation of mullite phase started at 900 °C. Formation of cristobalite was observed after annealing at 1000 °C for 12 hours. SEM and XRD techniques were applied to examine the morphology, microstructure and composition of the samples
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