Ceramic-ceramic composites can be engineered to have high erosion and wear resistance as well as high compressive strengths. Potential applications include pump components, bearings and other applications where a combination of corrosion and erosion resistance are required. In this project, ceramic matrix composites (CMCs) were fabricated using a novel melt approach in which aluminum alloys with varying Mg contents were grown into a SiC-reinforcement, producing alumina-silicon carbide CMCs. The corrosion behavior of the composites were characterized electrochemically in accordance with ASTM standards in a 3.5 wt% sodium chloride solution. Optical and scanning electron microscopy coupled with energy dispersive spectroscopy were used to characterize the microstructures. Image analysis was performed to determine volume percentages of the reinforcement material and the matrix. The erosion behavior of these materials was evaluated using microhardness profiles and abrasive testing per ASTM standards.

Subject
Limestone, Test methods, Materials, Slurry, Abrasion, Sand, Mass loss, Magnesium alloys, Silicon carbide, Composites, Steel, Ceramics, Aluminum alloys
Keywords:
ceramic matrix composite, silicon carbide, magnesium, wear, abrasion
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2020
Association for Materials Protection and Performance (AMPP)
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