Journal
CERAMICS INTERNATIONAL
Volume 49, Issue 22, Pages 36928-36934Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2023.09.023
Keywords
Al/SiC composites; Spark plasma sintering; Corrosion resistance; High-energy ball mill method
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Al/SiC composites with different Al contents were prepared by high-energy ball milling. The results showed that the Al/SiC composites with 10 vol% Al had the best properties, including higher strength, lower porosity, and higher density. The corrosion resistance of the composites also improved with increasing corrosion time.
Al/SiC composites with different Al contents were prepared by high-energy ball milling with Al powder and SiC powder as raw materials at a temperature of 1800 degrees C, a pressure of 50 MPa, and heat preservation for 5 min. The microstructures and phase compositions of the Al/SiC composites were observed using scanning electron mi-croscopy and X-ray diffraction. The results showed that the Al/SiC composites prepared by adding 10 vol% aluminum had the best properties: the strength was 310 MPa, the apparent porosity was 6.50%, and the density was 2.9192 g/cm3. Furthermore, the corrosion rate of the Al/SiC composites gradually decreased with increasing corrosion time when the Al/SiC composites were placed in a 3.5 wt% NaCl solution at room temperature. However, the corrosion rate differed for varying Al contents. The experimental results showed that the Al/SiC composites with 10 vol% Al have the best properties, including the smallest porosity, the largest density, and the highest corrosion resistance.
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