Fabrication and characterization of dispersion-strengthened aluminum composite
| Autor: | D. Seyferth, J. Choi, P. Czubarow, C. Sung, K. Park |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Proceedings, annual meeting, Electron Microscopy Society of America. 52:710-711 |
| ISSN: | 2690-1315 0424-8201 |
| DOI: | 10.1017/s0424820100171286 |
| Popis: | The excellent high-temperature mechanical properties of metal matrix composites (MMC) make it possible for potential high-temperature applications. Several methods have been used to make the MMC, i.e., plasma spray method, melted metal infiltration method, electroplate method, and foil metallurgy method. In this study, dispersion-strengthened Al composite has been fabricated by the pressing of Al powder and organosilicon preceramic polymer (polymethylsilane-PMS). The Al powder and PMS were pressed under uniaxial stress of 13.5 ksi for 1 hour, and then were pressed under isostatic stress of 40 ksi for 10 minutes at room temperature. Subsequently, it has been heated to 550°C for ∼2 hours under argon atmosphere. Two main chemical stages take place during the heating: pyrolysis of the PMS to create a ceramic (SiC or SiC/C) and solid state reaction of the Al powder and the ceramic at ∼660°C The microstructure of the composite was characterized using transmission electron microscopy in order to understand the relationship between the microstructural and mechanical properties. |
| Databáze: | OpenAIRE |
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