Densification, microstructure and properties of supersolidus liquid phase sintered 6711Al-SiC metal matrix composites

• Main Authors: Padmavathi C., Upadhyaya Anish
• Format: Article
• Language: English
• Published: International Institute for the Science of Sintering, Beograd 2010-01-01
• Series: Science of Sintering
• Subjects: 6711Al-SiC composites; sintering; densification; microstructure; mechanical and tribological properties
• Online Access: http://www.doiserbia.nb.rs/img/doi/0350-820X/2010/0350-820X1003363P.pdf

The present study compares the effect of SiC reinforcement on densification and properties of supersolidus liquid phase sintered 6711Al-SiC composites. The prealloyed 6711 powders were mixed with SiC ranging from 5 to 20 vol.%, compacted at 400 MPa and sintered at 630ºC under vacuum. It was shown that better densification, yield strength, wear and corrosion resistance were achieved up to 10 vol.% due to uniform distribution of SiC particles throughout matrix. Beyond 10 vol.%, SiC resulted in clustering and had detrimental effect on densification and mechanical properties. Age hardening of 6711-10SiC composites led to improvement in mechanical properties.