Alumina Matrix Composites Produced by Water-Based Tape Casting

Tatiane Mattos Amadio; João B. Rodrigues Neto; Dachamir Hotza

doi:10.4028/www.scientific.net/MSF.775-776.562

Paper Titles

Influence of Quartzite Residues on the Strength of Added Red Clay Ceramics
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Employment of Response Surface Methodology for Optimization of the Portland Cement Mechanical Resistance
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Effect Polymeric Modifier (Biostrength B150), and Organoclay on Properties of Poly(lactic acid) - PLA
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Study on Physical and Mechanical Properties of PHB Biocomposites with Rice Hull Ash
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Alumina Matrix Composites Produced by Water-Based Tape Casting
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Evaluation of Concretes Incorporated with Fluorescent Lamp Glass Waste
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Incorporation of Granite Waste from Diamond Wire Sawing Process into Cement Matrix Concrete
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Evaluation of the Physico-Mechanical Properties of Concretes Containing Pet and Crushed Sand
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Study of Mechanical Behavior of Components of Duplex Steel by Using of X-Ray Diffraction Technique
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Alumina Matrix Composites Produced by Water-Based Tape Casting

Abstract:

This work aimed to develop an alumina composite reinforced with polycrystalline alumina fibers to increase the mechanical properties of the product. A water-based processing was carried out, replacing the use of toxic and flammable organic solvents. The forming technique used was tape casting, which in addition to reliability and low cost, enables to make thin, flat tapes. The parameters for the tape casting process were: gap between the blades of 350 μm and casting speed of 12 cm/min. The process was optimized through a rheological study and alumina suspension with 50 wt.% solids was used. The slurry showed a pseudoplastic behavior and a high value of thixotropy. Several methods for separation and processing of the fibers were tested and a scattering using a specially designed support was the most efficient option. The tapes were thermopressed at 65°C and 30 MPa. The tensile test of green tapes showed a significant increase of the mechanical resistance for fiber-reinforced tapes, which was also dependent on fiber orientation.