Macro-Interface Characteristics of Bimodal-Structured Al Materials Produced by Ball-Milling

Abstract:

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The bimodal-structured materials composed of Al-5wt%Mg alloy and its composites reinforced with SiC and Al2O3 particles were prepared by ball-milling and subsequent compaction under the pressure of 350MPa and sintering at temperatures ranging from 973K to 1173K for 1h, 3h and 5h. The macro-interface between Al-Mg and Al-Mg/ Al2O3 composite was macroscopically well-bonded compared to that between Al-Mg and Al-Mg/SiC composite under same sintering conditions. The bonding of macro-interface became better as the sintering time and temperature increased, resulting in that the bimodal-structured materials sintered at 1173K for 5h showed the relative density of nearly 100%. In addition, the higher sintering temperature was, the more irregular macro-interface was. The microhardness of macro-interface area was in between the Al- Mg and composites, which was independent of the sintering temperature.

Info:

Periodical:

Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim

Pages:

821-824

DOI:

10.4028/www.scientific.net/MSF.534-536.821

Citation:

S. Y. Chang et al., "Macro-Interface Characteristics of Bimodal-Structured Al Materials Produced by Ball-Milling", Materials Science Forum, Vols. 534-536, pp. 821-824, 2007

Online since:

January 2007

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$35.00

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