1. Damping capacities and microstructures of magnesium matrix composites reinforced by graphite particles
- Author
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Wu, Y.W., Wu, K., Deng, K.K., Nie, K.B., Wang, X.J., Zheng, M.Y., and Hu, X.S.
- Subjects
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METALLIC composites , *MICROSTRUCTURE , *DAMPING (Mechanics) , *MAGNESIUM , *GRAPHITE , *MICROFABRICATION , *FOUNDING , *TEMPERATURE effect - Abstract
Abstract: Magnesium matrix composites reinforced by graphite particles were fabricated using stir casting with graphite particle size of 50μm and graphite particle volume fractions of 5%, 10%, 15% and 20%, respectively. A dynamic mechanical analyzer was used to measure the damping capacities of as-cast composites. The experimental results reveal that the graphite particles play an important role on the damping capacities of as-cast composites. The strain amplitude independent damping of as-cast composites increases significantly as the graphite particle volume fraction increases from 0% to 15%, but decreases when the volume fraction exceeds 15%. The damping values of as-cast composites rise slowly with increasing temperature from room temperature to 125°C, and have no obvious change with increasing temperature from 125°C to 250°C, but rise rapidly with increasing temperature from 250°C to 400°C. [Copyright &y& Elsevier]
- Published
- 2010
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