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http://dx.doi.org/10.12656/jksht.2021.34.2.60

The Effect of Pressing Type and Foaming Agent on the Microstructural Characteristic of Al Foam Produced by Powder Compact Processing  

Choi, Ji Woong (Dept. of Nanomechatronics Engineering, Pusan National University)
Kim, Hye Sung (Dept. of Nanomechatronics Engineering, Pusan National University)
Publication Information
Journal of the Korean Society for Heat Treatment / v.34, no.2, 2021 , pp. 60-65 More about this Journal
Abstract
In this study, the effect of pressure type and foaming agent on the microstructural change of Al foam produced by powder compact processing was investigated. Better foaming characteristic is easily obtained from extrusion process with strong plastic deformation and preheating than that by uniaxial pressing with preheating. In current powder compact foaming process using TiH2/MgH2 mixture as a foaming agent, a temperature of 670℃ and addition of 30% MgH2 in TiH2 foaming agent was chosen as the most suitable foaming condition. The aluminum (Al) foams with maximum porosity of around 70%, relatively regular pore size and distribution were successfully produced by means of the powder metallurgy method and extrusion process.
Keywords
Porous structure; Al foam; Powder processing; Foaming agent;
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