Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Effect of Pressing Type and Foaming Agent on the Microstructural Characteristic of Al Foam Produced by Powder Compact Processing

가압형태와 발포제가 분말성형 발포법에 의해 제조된 알루미늄 발포체의 미세구조에 미치는 영향

  • Choi, Ji Woong (Dept. of Nanomechatronics Engineering, Pusan National University) ;
  • Kim, Hye Sung (Dept. of Nanomechatronics Engineering, Pusan National University)
  • 최지웅 (부산대학교 나노메카트로닉스공학과) ;
  • 김혜성 (부산대학교 나노메카트로닉스공학과)
  • Received : 2021.02.09
  • Accepted : 2021.02.23
  • Published : 2021.03.30
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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.

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References

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