Articles written in Bulletin of Materials Science

    • A study on the damping capacity of BaTiO3-reinforced Al-matrix composites

      C J XIAO

      More Details Abstract Fulltext PDF

      To study the damping capacity of BaTiO$_3$/Al composites, Al composites reinforced with BaTiO$_3$ powder (average grain sizes: 100 and 1000 nm) were fabricated by the hot-pressing sintering method. The damping properties of pure Al and BaTiO$_3$/Al composites were investigated and compared based on the dynamic mechanical analysis over a wide range of temperatures (50–285$^{\circ}$C). Compared with pure Al matrix, 1000 nm BaTiO$_3$/Al composites with 5 and 10% mass fractions of BaTiO$_3$ exhibited better damping capacity. For 100 nm BaTiO$_3$/Al composite, its damping capacity is slightly higher than that of pure Al below 145$^{\circ}$C, while it becomes lower above this degree. The damping capacity enhancement of BaTiO$_3$/Al composites can be explained by the ferroelastic domain damping. Furthermore, 5 and 10% BaTiO$_3$/Al composites have higher bending strength and hardness than pure Al sample.

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