About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Metal-Matrix Composites: Analysis, Modeling, Observations and Interpretations
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Presentation Title |
Effects of Interface Characteristics on High Volume Fraction Al/SiCp Composites under Compressive Stress |
Author(s) |
Taegyu Lee, Donghyun Lee, Hobyung Chae, Soo Yeol Lee, Ho Jin Ryu |
On-Site Speaker (Planned) |
Taegyu Lee |
Abstract Scope |
Enhanced mechanical properties of high-volume-fraction (~55vol%) SiCp/Al composites were acquired by matrix-reinforcement interface modification. The interface modification was performed to increase mechanical properties of high-volume-fraction SiCp/Al composites by forming an additional layer on SiC particles by oxidation. The surface of two types of SiC reinforcements (coarse (30 μm) and fine (10 μm)) was oxidized and a 200 nm thick SiO2 layer was formed on the SiC surface. The interface modified SiCp/Al composites were fabricated by liquid pressing and the compression test was conducted under the in-situ neutron diffraction measurement system. The additional layer was transmuted to MgAl2O4 after the fabrication and it prevented a formation of brittle Al4C3. The change of interface characteristics increased the strength and the fracture strain for the coarse and fine SiCp composites, respectively. We found that the interface modification enhances the mechanical properties and the mechanism of the properties enhancement varies with the reinforcement size. |
Proceedings Inclusion? |
Planned: |