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Meeting Materials Science & Technology 2019
Symposium Multifunctional Ceramic- and Metal-matrix Composites: Processing, Microstructure, Properties and Performance
Presentation Title Comparison of In-situ Aluminum Metal Matrix Composite Processes
Author(s) Aaron T. Gladstein, Caleb Reese, Alan Taub
On-Site Speaker (Planned) Aaron T. Gladstein
Abstract Scope Metal matrix composites (MMCs) are used in the automotive and aerospace industries to decrease overall product weight while increasing component strength, wear resistance, and high temperature tensile properties. In-situ methods for creating MMCs offer better matrix-particle bonding, particle size distribution, and reduction in contamination as compared with ex-situ processes. This research focuses on the microstructural evolution, processing parameters, and strength enhancement for two separate in-situ methods of creating aluminum-based MMCs. Self-propagating high temperature synthesis (SHS) is compared with polymer-derived MMCs (PD-MMCs). For the SHS process, elemental powders are added directly into the aluminum melt and reacted at high temperatures to form ceramic nanoparticles. Similarly, PD-MMCs are created by pyrolyzing organic precursor polymers within the molten metal; the elements of the polymer chain are used to create ceramic particles. The particle size, morphology, and distribution are compared for the two processes.


Comparison of In-situ Aluminum Metal Matrix Composite Processes
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