Effects of Particle Size on Microstructure of the Matrix Alloy in Aluminum Matrix Composites


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Aluminum matrix composites, reinforced by 0.15μm and 5μm Al2O3 particles with 40% volume fractions were fabricated by squeeze casting technique. The microstructure characterization near the interfaces of Al2O3p/1070Al composites was investigated by SADP and HREM techniques. Results showed that high-density dislocations were generated in the 5μm-Al2O3p/Al composite due to the thermal mismatch stress. In contrast, the matrix of the 0.15μm-Al2O3p/Al composite appeared to be nearly free dislocations and some “micro distortion areas” of 1-5nm were observed, which was attributed to the dispersion of fine sub-micron particles and uniform distribution of the stress near the interfaces.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




L. T. Jiang et al., "Effects of Particle Size on Microstructure of the Matrix Alloy in Aluminum Matrix Composites", Materials Science Forum, Vols. 546-549, pp. 1655-1659, 2007

Online since:

May 2007




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