Investigation of microstructure inhomogeneity in SiCp-reinforced aluminum matrix composites

Date

2007-01-01

Author

Gacsi, Zoltan
Gür, Cemil Hakan
Makszimus, Andrea
Pieczonka, Tadeusz

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The type, volume fraction, size, shape and arrangement of embedded particles influence the mechanical properties of the particle reinforced metal matrix composites. This presents the investigation of the SiC particle and porosity distributions in various aluminum matrix composites produced by cold- and hot-pressing. The inicrostructures were characterized by optical microscopy and stereological parameters. SiC and porosity volume fractions, and the anisotropy distribution function were measured to establish the influence of the consolidation method. The results showed that SiC particles are arranged in a different way during the cold- and hot pressing. The amount of porosity in the hot pressed specimens is always lower than that in the cold pressed ones; however, cold pressed and sintered samples have few large pores whereas more fine pores develop in the hot pressed ones. In the cold pressed specimens, heating rate for sintering influences the final density, the amount of porosity increases parallel to the increase in the relative particle size; and coating of SiC particles with Cu lowers the porosity while Ni-coating does not result in such an effect.

Subject Keywords

Aluminum matrix composites, Powder metallurgy, Microstructure inhomogenity

URI

https://hdl.handle.net/11511/56893

DOI

https://doi.org/10.4028/0-87849-419-7.901

Conference Name

Power Metallurgy World Congress and Exhibition 2006

Collections

Department of Metallurgical and Materials Engineering, Conference / Seminar

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Citation Formats

Z. Gacsi, C. H. Gür, A. Makszimus, and T. Pieczonka, “Investigation of microstructure inhomogeneity in SiCp-reinforced aluminum matrix composites,” presented at the Power Metallurgy World Congress and Exhibition 2006, Busan, SOUTH KOREA, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56893.