Aluminum Foam Production Using Gas Injection In Melting

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Malekjafarian, Mostafa | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41379 (07)
University: Sharif University of Technology
Department: Materials and Sceince Engineering
Advisor(s): Sadrnezhad, Khatiboleslam
Abstract:
In this research, aluminum composite foams reinforced with silicon carbides were manufactured using melt direct foaming with gas. The density of produced foams changed from 0.1 to 0.35 g cm-3. At first, simulation of bubble configuration was carried out in order to specify the effective parameters on foaming process. As the result, parameters such as ceramic particle volume percentage and gas type were selected. Results showed that, to process foam with acceptable stability, there was a critical minimum of ceramic particles concentration above which, stability of the foam was enhanced. Gas type was also showed to have a significant effect on foam stability. Argon, carbon dioxide and air were utilized among which air caused an oxide layer on the foam surface, leading to higher foam stability. Aluminum foam stress-strain curve illustrates a grain-like behavior. In addition to that, compression test results show that an increase in silicon carbide amount results in improved compression strength and absorbed energy in produced foams
Keywords:
Production Process ; Gas Injection ; Aluminum Metal Foam ; Foam Stability

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